/*
 * jQuery validation plug-in 1.5.1
 *
 * http://bassistance.de/jquery-plugins/jquery-plugin-validation/
 * http://docs.jquery.com/Plugins/Validation
 *
 * Copyright (c) 2006 - 2008 Jörn Zaefferer
 *
 * $Id: jquery.validate.js 6096 2009-01-12 14:12:04Z joern.zaefferer $
 *
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 */
(function($){$.extend($.fn,{validate:function(options){if(!this.length){options&&options.debug&&window.console&&console.warn("nothing selected, can't validate, returning nothing");return;}var validator=$.data(this[0],'validator');if(validator){return validator;}validator=new $.validator(options,this[0]);$.data(this[0],'validator',validator);if(validator.settings.onsubmit){this.find("input, button").filter(".cancel").click(function(){validator.cancelSubmit=true;});this.submit(function(event){if(validator.settings.debug)event.preventDefault();function handle(){if(validator.settings.submitHandler){validator.settings.submitHandler.call(validator,validator.currentForm);return false;}return true;}if(validator.cancelSubmit){validator.cancelSubmit=false;return handle();}if(validator.form()){if(validator.pendingRequest){validator.formSubmitted=true;return false;}return handle();}else{validator.focusInvalid();return false;}});}return validator;},valid:function(){if($(this[0]).is('form')){return this.validate().form();}else{var valid=false;var validator=$(this[0].form).validate();this.each(function(){valid|=validator.element(this);});return valid;}},removeAttrs:function(attributes){var result={},$element=this;$.each(attributes.split(/\s/),function(index,value){result[value]=$element.attr(value);$element.removeAttr(value);});return result;},rules:function(command,argument){var element=this[0];if(command){var settings=$.data(element.form,'validator').settings;var staticRules=settings.rules;var existingRules=$.validator.staticRules(element);switch(command){case"add":$.extend(existingRules,$.validator.normalizeRule(argument));staticRules[element.name]=existingRules;if(argument.messages)settings.messages[element.name]=$.extend(settings.messages[element.name],argument.messages);break;case"remove":if(!argument){delete staticRules[element.name];return existingRules;}var filtered={};$.each(argument.split(/\s/),function(index,method){filtered[method]=existingRules[method];delete existingRules[method];});return filtered;}}var data=$.validator.normalizeRules($.extend({},$.validator.metadataRules(element),$.validator.classRules(element),$.validator.attributeRules(element),$.validator.staticRules(element)),element);if(data.required){var param=data.required;delete data.required;data=$.extend({required:param},data);}return data;}});$.extend($.expr[":"],{blank:function(a){return!$.trim(a.value);},filled:function(a){return!!$.trim(a.value);},unchecked:function(a){return!a.checked;}});$.format=function(source,params){if(arguments.length==1)return function(){var args=$.makeArray(arguments);args.unshift(source);return $.format.apply(this,args);};if(arguments.length>2&&params.constructor!=Array){params=$.makeArray(arguments).slice(1);}if(params.constructor!=Array){params=[params];}$.each(params,function(i,n){source=source.replace(new RegExp("\\{"+i+"\\}","g"),n);});return source;};$.validator=function(options,form){this.settings=$.extend({},$.validator.defaults,options);this.currentForm=form;this.init();};$.extend($.validator,{defaults:{messages:{},groups:{},rules:{},errorClass:"error",errorElement:"label",focusInvalid:true,errorContainer:$([]),errorLabelContainer:$([]),onsubmit:true,ignore:[],ignoreTitle:false,onfocusin:function(element){this.lastActive=element;if(this.settings.focusCleanup&&!this.blockFocusCleanup){this.settings.unhighlight&&this.settings.unhighlight.call(this,element,this.settings.errorClass);this.errorsFor(element).hide();}},onfocusout:function(element){if(!this.checkable(element)&&(element.name in this.submitted||!this.optional(element))){this.element(element);}},onkeyup:function(element){if(element.name in this.submitted||element==this.lastElement){this.element(element);}},onclick:function(element){if(element.name in this.submitted)this.element(element);},highlight:function(element,errorClass){$(element).addClass(errorClass);},unhighlight:function(element,errorClass){$(element).removeClass(errorClass);}},setDefaults:function(settings){$.extend($.validator.defaults,settings);},messages:{required:"This field is required.",remote:"Please fix this field.",email:"Please enter a valid email address.",url:"Please enter a valid URL.",date:"Please enter a valid date.",dateISO:"Please enter a valid date (ISO).",dateDE:"Bitte geben Sie ein gültiges Datum ein.",number:"Please enter a valid number.",numberDE:"Bitte geben Sie eine Nummer ein.",digits:"Please enter only digits",creditcard:"Please enter a valid credit card number.",equalTo:"Please enter the same value again.",accept:"Please enter a value with a valid extension.",maxlength:$.format("Please enter no more than {0} characters."),minlength:$.format("Please enter at least {0} characters."),rangelength:$.format("Please enter a value between {0} and {1} characters long."),range:$.format("Please enter a value between {0} and {1}."),max:$.format("Please enter a value less than or equal to {0}."),min:$.format("Please enter a value greater than or equal to {0}.")},autoCreateRanges:false,prototype:{init:function(){this.labelContainer=$(this.settings.errorLabelContainer);this.errorContext=this.labelContainer.length&&this.labelContainer||$(this.currentForm);this.containers=$(this.settings.errorContainer).add(this.settings.errorLabelContainer);this.submitted={};this.valueCache={};this.pendingRequest=0;this.pending={};this.invalid={};this.reset();var groups=(this.groups={});$.each(this.settings.groups,function(key,value){$.each(value.split(/\s/),function(index,name){groups[name]=key;});});var rules=this.settings.rules;$.each(rules,function(key,value){rules[key]=$.validator.normalizeRule(value);});function delegate(event){var validator=$.data(this[0].form,"validator");validator.settings["on"+event.type]&&validator.settings["on"+event.type].call(validator,this[0]);}$(this.currentForm).delegate("focusin focusout keyup",":text, :password, :file, select, textarea",delegate).delegate("click",":radio, :checkbox",delegate);if(this.settings.invalidHandler)$(this.currentForm).bind("invalid-form.validate",this.settings.invalidHandler);},form:function(){this.checkForm();$.extend(this.submitted,this.errorMap);this.invalid=$.extend({},this.errorMap);if(!this.valid())$(this.currentForm).triggerHandler("invalid-form",[this]);this.showErrors();return this.valid();},checkForm:function(){this.prepareForm();for(var i=0,elements=(this.currentElements=this.elements());elements[i];i++){this.check(elements[i]);}return this.valid();},element:function(element){element=this.clean(element);this.lastElement=element;this.prepareElement(element);this.currentElements=$(element);var result=this.check(element);if(result){delete this.invalid[element.name];}else{this.invalid[element.name]=true;}if(!this.numberOfInvalids()){this.toHide=this.toHide.add(this.containers);}this.showErrors();return result;},showErrors:function(errors){if(errors){$.extend(this.errorMap,errors);this.errorList=[];for(var name in errors){this.errorList.push({message:errors[name],element:this.findByName(name)[0]});}this.successList=$.grep(this.successList,function(element){return!(element.name in errors);});}this.settings.showErrors?this.settings.showErrors.call(this,this.errorMap,this.errorList):this.defaultShowErrors();},resetForm:function(){if($.fn.resetForm)$(this.currentForm).resetForm();this.submitted={};this.prepareForm();this.hideErrors();this.elements().removeClass(this.settings.errorClass);},numberOfInvalids:function(){return this.objectLength(this.invalid);},objectLength:function(obj){var count=0;for(var i in obj)count++;return count;},hideErrors:function(){this.addWrapper(this.toHide).hide();},valid:function(){return this.size()==0;},size:function(){return this.errorList.length;},focusInvalid:function(){if(this.settings.focusInvalid){try{$(this.findLastActive()||this.errorList.length&&this.errorList[0].element||[]).filter(":visible").focus();}catch(e){}}},findLastActive:function(){var lastActive=this.lastActive;return lastActive&&$.grep(this.errorList,function(n){return n.element.name==lastActive.name;}).length==1&&lastActive;},elements:function(){var validator=this,rulesCache={};return $([]).add(this.currentForm.elements).filter(":input").not(":submit, :reset, :image, [disabled]").not(this.settings.ignore).filter(function(){!this.name&&validator.settings.debug&&window.console&&console.error("%o has no name assigned",this);if(this.name in rulesCache||!validator.objectLength($(this).rules()))return false;rulesCache[this.name]=true;return true;});},clean:function(selector){return $(selector)[0];},errors:function(){return $(this.settings.errorElement+"."+this.settings.errorClass,this.errorContext);},reset:function(){this.successList=[];this.errorList=[];this.errorMap={};this.toShow=$([]);this.toHide=$([]);this.formSubmitted=false;this.currentElements=$([]);},prepareForm:function(){this.reset();this.toHide=this.errors().add(this.containers);},prepareElement:function(element){this.reset();this.toHide=this.errorsFor(element);},check:function(element){element=this.clean(element);if(this.checkable(element)){element=this.findByName(element.name)[0];}var rules=$(element).rules();var dependencyMismatch=false;for(method in rules){var rule={method:method,parameters:rules[method]};try{var result=$.validator.methods[method].call(this,element.value,element,rule.parameters);if(result=="dependency-mismatch"){dependencyMismatch=true;continue;}dependencyMismatch=false;if(result=="pending"){this.toHide=this.toHide.not(this.errorsFor(element));return;}if(!result){this.formatAndAdd(element,rule);return false;}}catch(e){this.settings.debug&&window.console&&console.log("exception occured when checking element "+element.id
+", check the '"+rule.method+"' method");throw e;}}if(dependencyMismatch)return;if(this.objectLength(rules))this.successList.push(element);return true;},customMetaMessage:function(element,method){if(!$.metadata)return;var meta=this.settings.meta?$(element).metadata()[this.settings.meta]:$(element).metadata();return meta&&meta.messages&&meta.messages[method];},customMessage:function(name,method){var m=this.settings.messages[name];return m&&(m.constructor==String?m:m[method]);},findDefined:function(){for(var i=0;i<arguments.length;i++){if(arguments[i]!==undefined)return arguments[i];}return undefined;},defaultMessage:function(element,method){return this.findDefined(this.customMessage(element.name,method),this.customMetaMessage(element,method),!this.settings.ignoreTitle&&element.title||undefined,$.validator.messages[method],"<strong>Warning: No message defined for "+element.name+"</strong>");},formatAndAdd:function(element,rule){var message=this.defaultMessage(element,rule.method);if(typeof message=="function")message=message.call(this,rule.parameters,element);this.errorList.push({message:message,element:element});this.errorMap[element.name]=message;this.submitted[element.name]=message;},addWrapper:function(toToggle){if(this.settings.wrapper)toToggle=toToggle.add(toToggle.parents(this.settings.wrapper));return toToggle;},defaultShowErrors:function(){for(var i=0;this.errorList[i];i++){var error=this.errorList[i];this.settings.highlight&&this.settings.highlight.call(this,error.element,this.settings.errorClass);this.showLabel(error.element,error.message);}if(this.errorList.length){this.toShow=this.toShow.add(this.containers);}if(this.settings.success){for(var i=0;this.successList[i];i++){this.showLabel(this.successList[i]);}}if(this.settings.unhighlight){for(var i=0,elements=this.validElements();elements[i];i++){this.settings.unhighlight.call(this,elements[i],this.settings.errorClass);}}this.toHide=this.toHide.not(this.toShow);this.hideErrors();this.addWrapper(this.toShow).show();},validElements:function(){return this.currentElements.not(this.invalidElements());},invalidElements:function(){return $(this.errorList).map(function(){return this.element;});},showLabel:function(element,message){var label=this.errorsFor(element);if(label.length){label.removeClass().addClass(this.settings.errorClass);label.attr("generated")&&label.html(message);}else{label=$("<"+this.settings.errorElement+"/>").attr({"for":this.idOrName(element),generated:true}).addClass(this.settings.errorClass).html(message||"");if(this.settings.wrapper){label=label.hide().show().wrap("<"+this.settings.wrapper+"/>").parent();}if(!this.labelContainer.append(label).length)this.settings.errorPlacement?this.settings.errorPlacement(label,$(element)):label.insertAfter(element);}if(!message&&this.settings.success){label.text("");typeof this.settings.success=="string"?label.addClass(this.settings.success):this.settings.success(label);}this.toShow=this.toShow.add(label);},errorsFor:function(element){return this.errors().filter("[for='"+this.idOrName(element)+"']");},idOrName:function(element){return this.groups[element.name]||(this.checkable(element)?element.name:element.id||element.name);},checkable:function(element){return/radio|checkbox/i.test(element.type);},findByName:function(name){var form=this.currentForm;return $(document.getElementsByName(name)).map(function(index,element){return element.form==form&&element.name==name&&element||null;});},getLength:function(value,element){switch(element.nodeName.toLowerCase()){case'select':return $("option:selected",element).length;case'input':if(this.checkable(element))return this.findByName(element.name).filter(':checked').length;}return value.length;},depend:function(param,element){return this.dependTypes[typeof param]?this.dependTypes[typeof param](param,element):true;},dependTypes:{"boolean":function(param,element){return param;},"string":function(param,element){return!!$(param,element.form).length;},"function":function(param,element){return param(element);}},optional:function(element){return!$.validator.methods.required.call(this,$.trim(element.value),element)&&"dependency-mismatch";},startRequest:function(element){if(!this.pending[element.name]){this.pendingRequest++;this.pending[element.name]=true;}},stopRequest:function(element,valid){this.pendingRequest--;if(this.pendingRequest<0)this.pendingRequest=0;delete this.pending[element.name];if(valid&&this.pendingRequest==0&&this.formSubmitted&&this.form()){$(this.currentForm).submit();}else if(!valid&&this.pendingRequest==0&&this.formSubmitted){$(this.currentForm).triggerHandler("invalid-form",[this]);}},previousValue:function(element){return $.data(element,"previousValue")||$.data(element,"previousValue",previous={old:null,valid:true,message:this.defaultMessage(element,"remote")});}},classRuleSettings:{required:{required:true},email:{email:true},url:{url:true},date:{date:true},dateISO:{dateISO:true},dateDE:{dateDE:true},number:{number:true},numberDE:{numberDE:true},digits:{digits:true},creditcard:{creditcard:true}},addClassRules:function(className,rules){className.constructor==String?this.classRuleSettings[className]=rules:$.extend(this.classRuleSettings,className);},classRules:function(element){var rules={};var classes=$(element).attr('class');classes&&$.each(classes.split(' '),function(){if(this in $.validator.classRuleSettings){$.extend(rules,$.validator.classRuleSettings[this]);}});return rules;},attributeRules:function(element){var rules={};var $element=$(element);for(method in $.validator.methods){var value=$element.attr(method);if(value){rules[method]=value;}}if(rules.maxlength&&/-1|2147483647|524288/.test(rules.maxlength)){delete rules.maxlength;}return rules;},metadataRules:function(element){if(!$.metadata)return{};var meta=$.data(element.form,'validator').settings.meta;return meta?$(element).metadata()[meta]:$(element).metadata();},staticRules:function(element){var rules={};var validator=$.data(element.form,'validator');if(validator.settings.rules){rules=$.validator.normalizeRule(validator.settings.rules[element.name])||{};}return rules;},normalizeRules:function(rules,element){$.each(rules,function(prop,val){if(val===false){delete rules[prop];return;}if(val.param||val.depends){var keepRule=true;switch(typeof val.depends){case"string":keepRule=!!$(val.depends,element.form).length;break;case"function":keepRule=val.depends.call(element,element);break;}if(keepRule){rules[prop]=val.param!==undefined?val.param:true;}else{delete rules[prop];}}});$.each(rules,function(rule,parameter){rules[rule]=$.isFunction(parameter)?parameter(element):parameter;});$.each(['minlength','maxlength','min','max'],function(){if(rules[this]){rules[this]=Number(rules[this]);}});$.each(['rangelength','range'],function(){if(rules[this]){rules[this]=[Number(rules[this][0]),Number(rules[this][1])];}});if($.validator.autoCreateRanges){if(rules.min&&rules.max){rules.range=[rules.min,rules.max];delete rules.min;delete rules.max;}if(rules.minlength&&rules.maxlength){rules.rangelength=[rules.minlength,rules.maxlength];delete rules.minlength;delete rules.maxlength;}}if(rules.messages){delete rules.messages}return rules;},normalizeRule:function(data){if(typeof data=="string"){var transformed={};$.each(data.split(/\s/),function(){transformed[this]=true;});data=transformed;}return data;},addMethod:function(name,method,message){$.validator.methods[name]=method;$.validator.messages[name]=message;if(method.length<3){$.validator.addClassRules(name,$.validator.normalizeRule(name));}},methods:{required:function(value,element,param){if(!this.depend(param,element))return"dependency-mismatch";switch(element.nodeName.toLowerCase()){case'select':var options=$("option:selected",element);return options.length>0&&(element.type=="select-multiple"||($.browser.msie&&!(options[0].attributes['value'].specified)?options[0].text:options[0].value).length>0);case'input':if(this.checkable(element))return this.getLength(value,element)>0;default:return $.trim(value).length>0;}},remote:function(value,element,param){if(this.optional(element))return"dependency-mismatch";var previous=this.previousValue(element);if(!this.settings.messages[element.name])this.settings.messages[element.name]={};this.settings.messages[element.name].remote=typeof previous.message=="function"?previous.message(value):previous.message;param=typeof param=="string"&&{url:param}||param;if(previous.old!==value){previous.old=value;var validator=this;this.startRequest(element);var data={};data[element.name]=value;$.ajax($.extend(true,{url:param,mode:"abort",port:"validate"+element.name,dataType:"json",data:data,success:function(response){if(response){var submitted=validator.formSubmitted;validator.prepareElement(element);validator.formSubmitted=submitted;validator.successList.push(element);validator.showErrors();}else{var errors={};errors[element.name]=response||validator.defaultMessage(element,"remote");validator.showErrors(errors);}previous.valid=response;validator.stopRequest(element,response);}},param));return"pending";}else if(this.pending[element.name]){return"pending";}return previous.valid;},minlength:function(value,element,param){return this.optional(element)||this.getLength($.trim(value),element)>=param;},maxlength:function(value,element,param){return this.optional(element)||this.getLength($.trim(value),element)<=param;},rangelength:function(value,element,param){var length=this.getLength($.trim(value),element);return this.optional(element)||(length>=param[0]&&length<=param[1]);},min:function(value,element,param){return this.optional(element)||value>=param;},max:function(value,element,param){return this.optional(element)||value<=param;},range:function(value,element,param){return this.optional(element)||(value>=param[0]&&value<=param[1]);},email:function(value,element){return this.optional(element)||/^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$/i.test(value);},url:function(value,element){return this.optional(element)||/^(https?|ftp):\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:)*@)?(((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?)(:\d*)?)(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*)?)?(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|[\uE000-\uF8FF]|\/|\?)*)?(\#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|\/|\?)*)?$/i.test(value);},date:function(value,element){return this.optional(element)||!/Invalid|NaN/.test(new Date(value));},dateISO:function(value,element){return this.optional(element)||/^\d{4}[\/-]\d{1,2}[\/-]\d{1,2}$/.test(value);},dateDE:function(value,element){return this.optional(element)||/^\d\d?\.\d\d?\.\d\d\d?\d?$/.test(value);},number:function(value,element){return this.optional(element)||/^-?(?:\d+|\d{1,3}(?:,\d{3})+)(?:\.\d+)?$/.test(value);},numberDE:function(value,element){return this.optional(element)||/^-?(?:\d+|\d{1,3}(?:\.\d{3})+)(?:,\d+)?$/.test(value);},digits:function(value,element){return this.optional(element)||/^\d+$/.test(value);},creditcard:function(value,element){if(this.optional(element))return"dependency-mismatch";if(/[^0-9-]+/.test(value))return false;var nCheck=0,nDigit=0,bEven=false;value=value.replace(/\D/g,"");for(n=value.length-1;n>=0;n--){var cDigit=value.charAt(n);var nDigit=parseInt(cDigit,10);if(bEven){if((nDigit*=2)>9)nDigit-=9;}nCheck+=nDigit;bEven=!bEven;}return(nCheck%10)==0;},accept:function(value,element,param){param=typeof param=="string"?param:"png|jpe?g|gif";return this.optional(element)||value.match(new RegExp(".("+param+")$","i"));},equalTo:function(value,element,param){return value==$(param).val();}}});})(jQuery);;(function($){var ajax=$.ajax;var pendingRequests={};$.ajax=function(settings){settings=$.extend(settings,$.extend({},$.ajaxSettings,settings));var port=settings.port;if(settings.mode=="abort"){if(pendingRequests[port]){pendingRequests[port].abort();}return(pendingRequests[port]=ajax.apply(this,arguments));}return ajax.apply(this,arguments);};})(jQuery);;(function($){$.each({focus:'focusin',blur:'focusout'},function(original,fix){$.event.special[fix]={setup:function(){if($.browser.msie)return false;this.addEventListener(original,$.event.special[fix].handler,true);},teardown:function(){if($.browser.msie)return false;this.removeEventListener(original,$.event.special[fix].handler,true);},handler:function(e){arguments[0]=$.event.fix(e);arguments[0].type=fix;return $.event.handle.apply(this,arguments);}};});$.extend($.fn,{delegate:function(type,delegate,handler){return this.bind(type,function(event){var target=$(event.target);if(target.is(delegate)){return handler.apply(target,arguments);}});},triggerEvent:function(type,target){return this.triggerHandler(type,[$.event.fix({type:type,target:target})]);}})})(jQuery);

// end validation plugin

/* break us out of any containing iframes */
if (top != self) {  
  top.location.replace(document.location); 
  alert('For security reasons, framing is not allowed; click OK to remove the frames.');
}  

// BEGIN: site.js
$().ready(function() {
    $.ajaxSetup({
        cache: false
    });
});

// extend jquery to help us plesantly hide elements
$.fn.extend({
    fadeOutAndRemove: function(options) {
        return this.each(function() {
            var toHide = $(this);
            toHide.fadeOut('fast', function() { toHide.remove(); });
        });
    }
});

function setupFormValidation(formSelector, validationRules, onSubmitCallback) {
    
    enableSubmitButton(formSelector);
        
    $(formSelector).validate({
        rules: (validationRules ? validationRules : {}),
        errorElement: "span",
        errorClass: "form-error",
        errorPlacement: function(error, element) {
            var span = element.prev().find("span.form-error");
            if (span.length == 0) {
                span = element.parent().find("span.form-error");
            }
            span.replaceWith(error);
        },
        submitHandler: function(form) {
            disableSubmitButton(formSelector);
            
            if (onSubmitCallback)
                onSubmitCallback(form);
            else
                form.submit();
        }
    });
}

function enableSubmitButton(formSelector) {
    setSubmitButtonDisabled(formSelector, false);
}
function disableSubmitButton(formSelector) {
    setSubmitButtonDisabled(formSelector, true);
}
function setSubmitButtonDisabled(formSelector, isDisabled) { // Don't call me, call my friends above..
    $(formSelector).find("input[type='submit']").attr("disabled", isDisabled ? "true" : "");    
}

function setConfirmUnload(message) {
    window.onbeforeunload = message ? function() { return message; } : null;
}

function showAjaxError(insertionSelector, msg) {
    var div = $('<div class="error-notification"><h2>' + msg + '</h2>(click on this box to dismiss)</div>');
    var fadeOut = function() {
        $(".error-notification").fadeOut("fast", function() { $(this).remove(); });
    };
        
    div.click(function(event) {
        fadeOut();
    });
    
    $(insertionSelector).append(div);
    div.fadeIn("fast");
    
    setTimeout(fadeOut, 1000 * 30);
}

function styleCode() {
    var hascode = false;
    $("pre code").parent().each(function() {
        if (!$(this).hasClass('prettyprint')) {
            $(this).addClass('prettyprint');
            hascode = true;
        }
    });
    if (hascode) { prettyPrint(); }
};

function appendLoader(containerSelector) {
    $(containerSelector).append('<img class="ajax-loader" src="/content/img/ajax-loader.gif" title="loading..." alt="loading..." />');
}

function removeLoader() {
    $("img.ajax-loader").remove();
}

function savePreference(key, value, callback) {
    $.post("/users/save-preference", { "fkey": preffkey, "key": key, "value": value }, callback);
}

// Used to display messages at the top of the page..
var notify = function() {
    var hasTable = false;
    var numMsgs = 0;
    var firstTimeMessageTypeId = -1;
    var cookieName = "m";  // system messages will also put a hash of current system message, e.g. "1234234"
    
    var renderMsg = function(json) {
        if (!hasTable) {
            $('#notify-container').append('<table id="notify-table"></table>');
            hasTable = true;
        }
        var html = '<tr' + (json.messageTypeId ? ' id="notify-' + json.messageTypeId + '"' : '');
        html += ' class="notify" style="display:none"><td class="notify">' + json.text;
        
        if (json.showProfile) {
            var userUrl = escape("/users/" + json.userId);
            html += ' See your <a href="/messages/mark-as-read?messagetypeid=' + json.messageTypeId + '&returnurl=' + userUrl + '">profile</a>.';
        }
        
        html += '</td><td class="notify-close"><a title="dismiss this notification" onclick="notify.close(';
        html += (json.messageTypeId ? json.messageTypeId : '') + ')">&times;</a></td></tr>';
        $("#notify-table").append(html);
    };
    
    var setFirstTimeCookie = function() {
        $.cookie("m", "-1", { expires: 90, path: "/" });
    };
    
    return {
        showFirstTime: function() {
            if ($.cookie("new")) { // this was the old cookie name - rename to our message holder
                $.cookie("new", "0", { expires: -1, path: "/" });
                setFirstTimeCookie();
            }
            
            if ($.cookie("m")) return; // don't show if we've got the cookie
            
            $("body").css("margin-top", "2.5em");
            renderMsg({ 
                messageTypeId: firstTimeMessageTypeId,
                text: 'First time here? Check out the <a onclick="notify.closeFirstTime()">FAQ</a>!' 
            });            
            $(".notify").fadeIn("slow");  
        },
        
        showMessages: function(jsonMsgArray) {
            for (var i = 0; i < jsonMsgArray.length; i++) {
                renderMsg(jsonMsgArray[i]);
            }
                
            $(".notify").fadeIn("slow");
            numMsgs = jsonMsgArray.length;
        },
        
        show: function(html) {
            $("body").css("margin-top", "2.5em");
            renderMsg({ text: html });
            $(".notify").fadeIn("slow");
        },
        
        close: function(messageTypeId) {
            var jHide;
            var newMargin = 0;
            if (messageTypeId && messageTypeId != firstTimeMessageTypeId) {
                $.post("/messages/mark-as-read", { "messagetypeid": messageTypeId });
                jHide = $("#notify-" + messageTypeId);
                if (numMsgs > 1) {
                    newMargin = parseInt($("body").css("margin-top").match(/\d+/));
                    newMargin = newMargin - (newMargin / numMsgs);
                }                    
            }
            else {
                if (messageTypeId && messageTypeId == firstTimeMessageTypeId)
                    setFirstTimeCookie();
                
                jHide = $(".notify");
            }
            jHide.children("td").css("border-bottom", "none").end().fadeOut("fast", function() { 
                $("body").css("margin-top", newMargin + "px"); 
                jHide.remove();
            });
        },
        
        closeFirstTime: function() {
            setFirstTimeCookie();
            document.location = "/faq";
        }
    };
} ();

// BEGIN: tag preferences

function applyPrefs(isInitialLoad) {
    
    var jIgnoredPrefs = $("#ignoredTags > a");
    var jInterestedPrefs = $("#interestingTags > a");
    
    if (isInitialLoad && jIgnoredPrefs.length == 0 && jInterestedPrefs.length == 0) return;
    
    // reset classes..
    $("div.question-summary").removeClass("tagged-ignored tagged-ignored-hidden tagged-interesting");
    
    // create selectors for interesting/ignored tags..
    var ignoredSelector = getTagsSelector(jIgnoredPrefs);
    var interestedSelector = getTagsSelector(jInterestedPrefs);
    
    if (ignoredSelector.length > 0) {
        var ignoredClass = $("#hideIgnored").is(":checked") ? "tagged-ignored-hidden" : "tagged-ignored";
        $(ignoredSelector).parents("div.question-summary").addClass(ignoredClass);
    }
    
    if (interestedSelector.length > 0)
        $(interestedSelector).parents("div.question-summary").addClass("tagged-interesting");
}

function getTagsSelector(jPrefs) {
    var result = "";
    var tag = "";
    jPrefs.each(function() {
        var wildcard = false;
        tag = $(this).text();

        // css class names can contain unicode, but not raw: . # + 
        if (tag.indexOf("#") > -1) tag = tag.replace(/#/g, "JJJ");
        if (tag.indexOf("+") > -1) tag = tag.replace(/\+/g, "XXX");
        if (tag.indexOf(".") > -1) tag = tag.replace(/\./g, "ZZZ");
        if (tag.indexOf("*") > -1) wildcard = true;

        if (wildcard) {            
            result += "div.tags:regex(class, t-" + tag.replace(/\*/g, ".*") + "),";
        }
        else
            result += "div.t-" + tag + ",";

    });
    if (result.length > 0)
        result = result.substring(0, result.length - 1); // remove trailing comma..
    
    return result;
}

function saveTags(tagName, spanName, preferenceId, tagClass) {
    var tags = $.trim($(tagName).val());
    var tagsSplit = tags.split(" ");
    var duplicate = false;

    for (var i = 0; i < tagsSplit.length; i++) {
        if ($.trim(tagsSplit[i]).length != 0) {
            $(spanName).children().each(function() {
                if ($(this).text() == tagsSplit[i]) {
                    $(this).fadeTo(500, 0.1).fadeTo(500, 1);
                    duplicate = true;
                    return;
                }
            });

            if (!duplicate) {
                $(spanName).append("<a id='" + tagsSplit[i] + "' href='/questions/tagged/" + tagsSplit[i].replace(/\*/g, "")  + "' class='" + tagClass + "' title='click to delete this tag'>" + tagsSplit[i] + "</a> ");
                initDeleteBindings(preferenceId);
            }

            duplicate = false;
        }
    }
    $(tagName).val("").focus();
    savePreference(preferenceId, $(spanName).text());
    applyPrefs();
}

function initTagPrefs() {
    initDeleteBindings(0);

    $("#ignoredAdd").click(function() {
        saveTags("#ignoredTag", "#ignoredTags", 25, "post-tag");
    });

    $("#interestingAdd").click(function() {
        saveTags("#interestingTag", "#interestingTags", 20, "post-tag");
    });

    $("#hideIgnored").click(function() {
        savePreference(30, $(this).is(":checked"));
        applyPrefs();
    });
    
    
    bindTagFilterAutoComplete("#ignoredTag");
    bindTagFilterAutoComplete("#interestingTag");
}

function initDeleteBindings(preferenceId) {
    var img = imagePath.replace("{0}", "comment-del.png");
    var imgHover = imagePath.replace("{0}", "comment-del-hover.png");

    var html = '<img class=\'delete\' src="' + img + '" onmouseover="$(this).attr(\'src\', \'' + imgHover + '\')" onmouseout="$(this).attr(\'src\', \'' + img;
    html += '\')" title="remove this tag" />';

    if (preferenceId == 0)
        $("#ignoredTags > .post-tag").after(html);

    if (preferenceId == 25)
        $("#ignoredTags > .post-tag:last").after(html);

    $("#ignoredTags > .delete").click(function() {
        $(this).prev().remove();
        $(this).remove();
        savePreference(25, $("#ignoredTags").text());
        applyPrefs();
    });

    if (preferenceId == 0)
        $("#interestingTags > .post-tag").after(html);

    if (preferenceId == 20)
        $("#interestingTags > .post-tag:last").after(html);

    $("#interestingTags > .delete").click(function() {
        $(this).prev().remove();
        $(this).remove();
        savePreference(20, $("#interestingTags").text());
        applyPrefs();
    });
}

function initBindingsAddSuggestedTag() {
    var img = "/content/img/add-small.png";
    var imgHover = "/content/img/add-small-hover.png";

    var html = '<img class=\'add\' src="' + img + '" onmouseover="$(this).attr(\'src\', \'' + imgHover + '\')" onmouseout="$(this).attr(\'src\', \'' + img;
    html += '\')" title="add this tag to interesting tags" />';

    $("#suggestedTags > .post-tag").after(html);

    $("#suggestedTags > .add").click(function() {
        $("#interestingTag").val($("#interestingTag").val() + $(this).prev().text() + " ");
    });
}

// END: tag preferences

// ******* PUT ANY 3RD PARTY LIBRARIES BELOW THIS LINE, PLEASE *******



// BEGIN: jquery.cookie.js

/**
 * Get the value of a cookie with the given name.
 *
 * @example $.cookie('the_cookie');
 * @desc Get the value of a cookie.
 *
 * @param String name The name of the cookie.
 * @return The value of the cookie.
 * @type String
 *
 * @name $.cookie
 * @cat Plugins/Cookie
 * @author Klaus Hartl/klaus.hartl@stilbuero.de
 */
jQuery.cookie = function(name, value, options) {
    if (typeof value != 'undefined') { // name and value given, set cookie
        options = options || {};
        if (value === null) {
            value = '';
            options.expires = -1;
        }
        var expires = '';
        if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
            var date;
            if (typeof options.expires == 'number') {
                date = new Date();
                date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));
            } else {
                date = options.expires;
            }
            expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE
        }
        // CAUTION: Needed to parenthesize options.path and options.domain
        // in the following expressions, otherwise they evaluate to undefined
        // in the packed version for some reason...
        var path = options.path ? '; path=' + (options.path) : '';
        var domain = options.domain ? '; domain=' + (options.domain) : '';
        var secure = options.secure ? '; secure' : '';
        document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
    } else { // only name given, get cookie
        var cookieValue = null;
        if (document.cookie && document.cookie != '') {
            var cookies = document.cookie.split(';');
            for (var i = 0; i < cookies.length; i++) {
                var cookie = jQuery.trim(cookies[i]);
                // Does this cookie string begin with the name we want?
                if (cookie.substring(0, name.length + 1) == (name + '=')) {
                    cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                    break;
                }
            }
        }
        return cookieValue;
    }
};

// END: jquery.cookie.js


// BEGIN: prettify.js

// Copyright (C) 2006 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.


/**
 * @fileoverview
 * some functions for browser-side pretty printing of code contained in html.
 *
 * The lexer should work on a number of languages including C and friends,
 * Java, Python, Bash, SQL, HTML, XML, CSS, Javascript, and Makefiles.
 * It works passably on Ruby, PHP and Awk and a decent subset of Perl, but,
 * because of commenting conventions, doesn't work on Smalltalk, Lisp-like, or
 * CAML-like languages.
 *
 * If there's a language not mentioned here, then I don't know it, and don't
 * know whether it works.  If it has a C-like, Bash-like, or XML-like syntax
 * then it should work passably.
 *
 * Usage:
 * 1) include this source file in an html page via
 * <script type="text/javascript" src="/path/to/prettify.js"></script>
 * 2) define style rules.  See the example page for examples.
 * 3) mark the <pre> and <code> tags in your source with class=prettyprint.
 *    You can also use the (html deprecated) <xmp> tag, but the pretty printer
 *    needs to do more substantial DOM manipulations to support that, so some
 *    css styles may not be preserved.
 * That's it.  I wanted to keep the API as simple as possible, so there's no
 * need to specify which language the code is in.
 *
 * Change log:
 * cbeust, 2006/08/22
 *   Java annotations (start with "@") are now captured as literals ("lit")
 */

// JSLint declarations
/*global console, document, navigator, setTimeout, window */

/**
 * Split {@code prettyPrint} into multiple timeouts so as not to interfere with
 * UI events.
 * If set to {@code false}, {@code prettyPrint()} is synchronous.
 */
window['PR_SHOULD_USE_CONTINUATION'] = true;

/** the number of characters between tab columns */
window['PR_TAB_WIDTH'] = 8;

/** Walks the DOM returning a properly escaped version of innerHTML.
  * @param {Node} node
  * @param {Array.<string>} out output buffer that receives chunks of HTML.
  */
window['PR_normalizedHtml']

/** Contains functions for creating and registering new language handlers.
  * @type {Object}
  */
  = window['PR']

/** Pretty print a chunk of code.
  *
  * @param {string} sourceCodeHtml code as html
  * @return {string} code as html, but prettier
  */
  = window['prettyPrintOne']
/** find all the < pre > and < code > tags in the DOM with class=prettyprint
  * and prettify them.
  * @param {Function} opt_whenDone if specified, called when the last entry
  *     has been finished.
  */
  = window['prettyPrint'] = void 0;

/** browser detection. @extern */
window['_pr_isIE6'] = function () {
  var isIE6 = navigator && navigator.userAgent &&
      /\bMSIE 6\./.test(navigator.userAgent);
  window['_pr_isIE6'] = function () { return isIE6; };
  return isIE6;
};


(function () {
  /** Splits input on space and returns an Object mapping each non-empty part to
    * true.
    */
  function wordSet(words) {
    words = words.split(/ /g);
    var set = {};
    for (var i = words.length; --i >= 0;) {
      var w = words[i];
      if (w) { set[w] = null; }
    }
    return set;
  }

  // Keyword lists for various languages.
  var FLOW_CONTROL_KEYWORDS =
      "break continue do else for if return while ";
  var C_KEYWORDS = FLOW_CONTROL_KEYWORDS + "auto case char const default " +
      "double enum extern float goto int long register short signed sizeof " +
      "static struct switch typedef union unsigned void volatile ";
  var COMMON_KEYWORDS = C_KEYWORDS + "catch class delete false import " +
      "new operator private protected public this throw true try ";
  var CPP_KEYWORDS = COMMON_KEYWORDS + "alignof align_union asm axiom bool " +
      "concept concept_map const_cast constexpr decltype " +
      "dynamic_cast explicit export friend inline late_check " +
      "mutable namespace nullptr reinterpret_cast static_assert static_cast " +
      "template typeid typename typeof using virtual wchar_t where ";
  var JAVA_KEYWORDS = COMMON_KEYWORDS +
      "boolean byte extends final finally implements import instanceof null " +
      "native package strictfp super synchronized throws transient ";
  var CSHARP_KEYWORDS = JAVA_KEYWORDS +
      "as base by checked decimal delegate descending event " +
      "fixed foreach from group implicit in interface internal into is lock " +
      "object out override orderby params readonly ref sbyte sealed " +
      "stackalloc string select uint ulong unchecked unsafe ushort var ";
  var JSCRIPT_KEYWORDS = COMMON_KEYWORDS +
      "debugger eval export function get null set undefined var with " +
      "Infinity NaN ";
  var PERL_KEYWORDS = "caller delete die do dump elsif eval exit foreach for " +
      "goto if import last local my next no our print package redo require " +
      "sub undef unless until use wantarray while BEGIN END ";
  var PYTHON_KEYWORDS = FLOW_CONTROL_KEYWORDS + "and as assert class def del " +
      "elif except exec finally from global import in is lambda " +
      "nonlocal not or pass print raise try with yield " +
      "False True None ";
  var RUBY_KEYWORDS = FLOW_CONTROL_KEYWORDS + "alias and begin case class def" +
      " defined elsif end ensure false in module next nil not or redo rescue " +
      "retry self super then true undef unless until when yield BEGIN END ";
  var SH_KEYWORDS = FLOW_CONTROL_KEYWORDS + "case done elif esac eval fi " +
      "function in local set then until ";
  var ALL_KEYWORDS = (
      CPP_KEYWORDS + CSHARP_KEYWORDS + JSCRIPT_KEYWORDS + PERL_KEYWORDS +
      PYTHON_KEYWORDS + RUBY_KEYWORDS + SH_KEYWORDS);

  // token style names.  correspond to css classes
  /** token style for a string literal */
  var PR_STRING = 'str';
  /** token style for a keyword */
  var PR_KEYWORD = 'kwd';
  /** token style for a comment */
  var PR_COMMENT = 'com';
  /** token style for a type */
  var PR_TYPE = 'typ';
  /** token style for a literal value.  e.g. 1, null, true. */
  var PR_LITERAL = 'lit';
  /** token style for a punctuation string. */
  var PR_PUNCTUATION = 'pun';
  /** token style for a punctuation string. */
  var PR_PLAIN = 'pln';

  /** token style for an sgml tag. */
  var PR_TAG = 'tag';
  /** token style for a markup declaration such as a DOCTYPE. */
  var PR_DECLARATION = 'dec';
  /** token style for embedded source. */
  var PR_SOURCE = 'src';
  /** token style for an sgml attribute name. */
  var PR_ATTRIB_NAME = 'atn';
  /** token style for an sgml attribute value. */
  var PR_ATTRIB_VALUE = 'atv';

  /**
   * A class that indicates a section of markup that is not code, e.g. to allow
   * embedding of line numbers within code listings.
   */
  var PR_NOCODE = 'nocode';

  function isWordChar(ch) {
    return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z');
  }

  /** Splice one array into another.
    * Like the python <code>
    * container[containerPosition:containerPosition + countReplaced] = inserted
    * </code>
    * @param {Array} inserted
    * @param {Array} container modified in place
    * @param {Number} containerPosition
    * @param {Number} countReplaced
    */
  function spliceArrayInto(
      inserted, container, containerPosition, countReplaced) {
    inserted.unshift(containerPosition, countReplaced || 0);
    try {
      container.splice.apply(container, inserted);
    } finally {
      inserted.splice(0, 2);
    }
  }

  /** A set of tokens that can precede a regular expression literal in
    * javascript.
    * http://www.mozilla.org/js/language/js20/rationale/syntax.html has the full
    * list, but I've removed ones that might be problematic when seen in
    * languages that don't support regular expression literals.
    *
    * <p>Specifically, I've removed any keywords that can't precede a regexp
    * literal in a syntactically legal javascript program, and I've removed the
    * "in" keyword since it's not a keyword in many languages, and might be used
    * as a count of inches.
    *
    * <p>The link a above does not accurately describe EcmaScript rules since
    * it fails to distinguish between (a=++/b/i) and (a++/b/i) but it works
    * very well in practice.
    *
    * @private
    */
  var REGEXP_PRECEDER_PATTERN = function () {
      var preceders = [
          "!", "!=", "!==", "#", "%", "%=", "&", "&&", "&&=",
          "&=", "(", "*", "*=", /* "+", */ "+=", ",", /* "-", */ "-=",
          "->", /*".", "..", "...", handled below */ "/", "/=", ":", "::", ";",
          "<", "<<", "<<=", "<=", "=", "==", "===", ">",
          ">=", ">>", ">>=", ">>>", ">>>=", "?", "@", "[",
          "^", "^=", "^^", "^^=", "{", "|", "|=", "||",
          "||=", "~" /* handles =~ and !~ */,
          "break", "case", "continue", "delete",
          "do", "else", "finally", "instanceof",
          "return", "throw", "try", "typeof"
          ];
      var pattern = '(?:' +
          '(?:(?:^|[^0-9.])\\.{1,3})|' +  // a dot that's not part of a number
          '(?:(?:^|[^\\+])\\+)|' +  // allow + but not ++
          '(?:(?:^|[^\\-])-)';  // allow - but not --
      for (var i = 0; i < preceders.length; ++i) {
        var preceder = preceders[i];
        if (isWordChar(preceder.charAt(0))) {
          pattern += '|\\b' + preceder;
        } else {
          pattern += '|' + preceder.replace(/([^=<>:&])/g, '\\$1');
        }
      }
      pattern += '|^)\\s*$';  // matches at end, and matches empty string
      return new RegExp(pattern);
      // CAVEAT: this does not properly handle the case where a regular
      // expression immediately follows another since a regular expression may
      // have flags for case-sensitivity and the like.  Having regexp tokens
      // adjacent is not valid in any language I'm aware of, so I'm punting.
      // TODO: maybe style special characters inside a regexp as punctuation.
    }();

  // Define regexps here so that the interpreter doesn't have to create an
  // object each time the function containing them is called.
  // The language spec requires a new object created even if you don't access
  // the $1 members.
  var pr_amp = /&/g;
  var pr_lt = /</g;
  var pr_gt = />/g;
  var pr_quot = /\"/g;
  /** like textToHtml but escapes double quotes to be attribute safe. */
  function attribToHtml(str) {
    return str.replace(pr_amp, '&amp;')
        .replace(pr_lt, '&lt;')
        .replace(pr_gt, '&gt;')
        .replace(pr_quot, '&quot;');
  }

  /** escapest html special characters to html. */
  function textToHtml(str) {
    return str.replace(pr_amp, '&amp;')
        .replace(pr_lt, '&lt;')
        .replace(pr_gt, '&gt;');
  }


  var pr_ltEnt = /&lt;/g;
  var pr_gtEnt = /&gt;/g;
  var pr_aposEnt = /&apos;/g;
  var pr_quotEnt = /&quot;/g;
  var pr_ampEnt = /&amp;/g;
  var pr_nbspEnt = /&nbsp;/g;
  /** unescapes html to plain text. */
  function htmlToText(html) {
    var pos = html.indexOf('&');
    if (pos < 0) { return html; }
    // Handle numeric entities specially.  We can't use functional substitution
    // since that doesn't work in older versions of Safari.
    // These should be rare since most browsers convert them to normal chars.
    for (--pos; (pos = html.indexOf('&#', pos + 1)) >= 0;) {
      var end = html.indexOf(';', pos);
      if (end >= 0) {
        var num = html.substring(pos + 3, end);
        var radix = 10;
        if (num && num.charAt(0) === 'x') {
          num = num.substring(1);
          radix = 16;
        }
        var codePoint = parseInt(num, radix);
        if (!isNaN(codePoint)) {
          html = (html.substring(0, pos) + String.fromCharCode(codePoint) +
                  html.substring(end + 1));
        }
      }
    }

    return html.replace(pr_ltEnt, '<')
        .replace(pr_gtEnt, '>')
        .replace(pr_aposEnt, "'")
        .replace(pr_quotEnt, '"')
        .replace(pr_ampEnt, '&')
        .replace(pr_nbspEnt, ' ');
  }

  /** is the given node's innerHTML normally unescaped? */
  function isRawContent(node) {
    return 'XMP' === node.tagName;
  }

  function normalizedHtml(node, out) {
    switch (node.nodeType) {
      case 1:  // an element
        var name = node.tagName.toLowerCase();
        out.push('<', name);
        for (var i = 0; i < node.attributes.length; ++i) {
          var attr = node.attributes[i];
          if (!attr.specified) { continue; }
          out.push(' ');
          normalizedHtml(attr, out);
        }
        out.push('>');
        for (var child = node.firstChild; child; child = child.nextSibling) {
          normalizedHtml(child, out);
        }
        if (node.firstChild || !/^(?:br|link|img)$/.test(name)) {
          out.push('<\/', name, '>');
        }
        break;
      case 2: // an attribute
        out.push(node.name.toLowerCase(), '="', attribToHtml(node.value), '"');
        break;
      case 3: case 4: // text
        out.push(textToHtml(node.nodeValue));
        break;
    }
  }

  var PR_innerHtmlWorks = null;
  function getInnerHtml(node) {
    // inner html is hopelessly broken in Safari 2.0.4 when the content is
    // an html description of well formed XML and the containing tag is a PRE
    // tag, so we detect that case and emulate innerHTML.
    if (null === PR_innerHtmlWorks) {
      var testNode = document.createElement('PRE');
      testNode.appendChild(
          document.createTextNode('<!DOCTYPE foo PUBLIC "foo bar">\n<foo />'));
      PR_innerHtmlWorks = !/</.test(testNode.innerHTML);
    }

    if (PR_innerHtmlWorks) {
      var content = node.innerHTML;
      // XMP tags contain unescaped entities so require special handling.
      if (isRawContent(node)) {
        content = textToHtml(content);
      }
      return content;
    }

    var out = [];
    for (var child = node.firstChild; child; child = child.nextSibling) {
      normalizedHtml(child, out);
    }
    return out.join('');
  }

  /** returns a function that expand tabs to spaces.  This function can be fed
    * successive chunks of text, and will maintain its own internal state to
    * keep track of how tabs are expanded.
    * @return {function (string) : string} a function that takes
    *   plain text and return the text with tabs expanded.
    * @private
    */
  function makeTabExpander(tabWidth) {
    var SPACES = '                ';
    var charInLine = 0;

    return function (plainText) {
      // walk over each character looking for tabs and newlines.
      // On tabs, expand them.  On newlines, reset charInLine.
      // Otherwise increment charInLine
      var out = null;
      var pos = 0;
      for (var i = 0, n = plainText.length; i < n; ++i) {
        var ch = plainText.charAt(i);

        switch (ch) {
          case '\t':
            if (!out) { out = []; }
            out.push(plainText.substring(pos, i));
            // calculate how much space we need in front of this part
            // nSpaces is the amount of padding -- the number of spaces needed
            // to move us to the next column, where columns occur at factors of
            // tabWidth.
            var nSpaces = tabWidth - (charInLine % tabWidth);
            charInLine += nSpaces;
            for (; nSpaces >= 0; nSpaces -= SPACES.length) {
              out.push(SPACES.substring(0, nSpaces));
            }
            pos = i + 1;
            break;
          case '\n':
            charInLine = 0;
            break;
          default:
            ++charInLine;
        }
      }
      if (!out) { return plainText; }
      out.push(plainText.substring(pos));
      return out.join('');
    };
  }

  // The below pattern matches one of the following
  // (1) /[^<]+/ : A run of characters other than '<'
  // (2) /<!--.*?-->/: an HTML comment
  // (3) /<!\[CDATA\[.*?\]\]>/: a cdata section
  // (3) /<\/?[a-zA-Z][^>]*>/ : A probably tag that should not be highlighted
  // (4) /</ : A '<' that does not begin a larger chunk.  Treated as 1
  var pr_chunkPattern =
  /(?:[^<]+|<!--[\s\S]*?-->|<!\[CDATA\[([\s\S]*?)\]\]>|<\/?[a-zA-Z][^>]*>|<)/g;
  var pr_commentPrefix = /^<!--/;
  var pr_cdataPrefix = /^<\[CDATA\[/;
  var pr_brPrefix = /^<br\b/i;
  var pr_tagNameRe = /^<(\/?)([a-zA-Z]+)/;

  /** split markup into chunks of html tags (style null) and
    * plain text (style {@link #PR_PLAIN}), converting tags which are
    * significant for tokenization (<br>) into their textual equivalent.
    *
    * @param {string} s html where whitespace is considered significant.
    * @return {Object} source code and extracted tags.
    * @private
    */
  function extractTags(s) {
    // since the pattern has the 'g' modifier and defines no capturing groups,
    // this will return a list of all chunks which we then classify and wrap as
    // PR_Tokens
    var matches = s.match(pr_chunkPattern);
    var sourceBuf = [];
    var sourceBufLen = 0;
    var extractedTags = [];
    if (matches) {
      for (var i = 0, n = matches.length; i < n; ++i) {
        var match = matches[i];
        if (match.length > 1 && match.charAt(0) === '<') {
          if (pr_commentPrefix.test(match)) { continue; }
          if (pr_cdataPrefix.test(match)) {
            // strip CDATA prefix and suffix.  Don't unescape since it's CDATA
            sourceBuf.push(match.substring(9, match.length - 3));
            sourceBufLen += match.length - 12;
          } else if (pr_brPrefix.test(match)) {
            // <br> tags are lexically significant so convert them to text.
            // This is undone later.
            sourceBuf.push('\n');
            ++sourceBufLen;
          } else {
            if (match.indexOf(PR_NOCODE) >= 0 && isNoCodeTag(match)) {
              // A <span class="nocode"> will start a section that should be
              // ignored.  Continue walking the list until we see a matching end
              // tag.
              var name = match.match(pr_tagNameRe)[2];
              var depth = 1;
              var j;
              end_tag_loop:
              for (j = i + 1; j < n; ++j) {
                var name2 = matches[j].match(pr_tagNameRe);
                if (name2 && name2[2] === name) {
                  if (name2[1] === '/') {
                    if (--depth === 0) { break end_tag_loop; }
                  } else {
                    ++depth;
                  }
                }
              }
              if (j < n) {
                extractedTags.push(
                    sourceBufLen, matches.slice(i, j + 1).join(''));
                i = j;
              } else {  // Ignore unclosed sections.
                extractedTags.push(sourceBufLen, match);
              }
            } else {
              extractedTags.push(sourceBufLen, match);
            }
          }
        } else {
          var literalText = htmlToText(match);
          sourceBuf.push(literalText);
          sourceBufLen += literalText.length;
        }
      }
    }
    return { source: sourceBuf.join(''), tags: extractedTags };
  }

  /** True if the given tag contains a class attribute with the nocode class. */
  function isNoCodeTag(tag) {
    return !!tag
        // First canonicalize the representation of attributes
        .replace(/\s(\w+)\s*=\s*(?:\"([^\"]*)\"|'([^\']*)'|(\S+))/g,
                 ' $1="$2$3$4"')
        // Then look for the attribute we want.
        .match(/[cC][lL][aA][sS][sS]=\"[^\"]*\bnocode\b/);
  }

  /**
   * Apply the given language handler to sourceCode and add the resulting
   * decorations to out.
   * @param {number} offset the index of sourceCode within the chunk of source
   *    whose decorations are already present on out.
   */
  function appendDecorations(offset, sourceCode, langHandler, out) {
    if (!sourceCode) { return; }
    var decorations = langHandler.call({}, sourceCode);
    if (offset) {
      for (var i = decorations.length; (i -= 2) >= 0;) {
        decorations[i] += offset;
      }
    }
    out.push.apply(out, decorations);
  }

  /** Given triples of [style, pattern, context] returns a lexing function,
    * The lexing function interprets the patterns to find token boundaries and
    * returns a decoration list of the form
    * [index_0, style_0, index_1, style_1, ..., index_n, style_n]
    * where index_n is an index into the sourceCode, and style_n is a style
    * constant like PR_PLAIN.  index_n-1 <= index_n, and style_n-1 applies to
    * all characters in sourceCode[index_n-1:index_n].
    *
    * The stylePatterns is a list whose elements have the form
    * [style : string, pattern : RegExp, context : RegExp, shortcut : string].
    *
    * Style is a style constant like PR_PLAIN, or can be a string of the
    * form 'lang-FOO', where FOO is a language extension describing the
    * language of the portion of the token in $1 after pattern executes.
    * E.g., if style is 'lang-lisp', and group 1 contains the text
    * '(hello (world))', then that portion of the token will be passed to the
    * registered lisp handler for formatting.
    * The text before and after group 1 will be restyled using this decorator
    * so decorators should take care that this doesn't result in infinite
    * recursion.  For example, the HTML lexer rule for SCRIPT elements looks
    * something like ['lang-js', /<[s]cript>(.+?)<\/script>/].  This may match
    * '<script>foo()<\/script>', which would cause the current decorator to
    * be called with '<script>' which would not match the same rule since
    * group 1 must not be empty, so it would be instead styled as PR_TAG by
    * the generic tag rule.  The handler registered for the 'js' extension would
    * then be called with 'foo()', and finally, the current decorator would
    * be called with '<\/script>' which would not match the original rule and
    * so the generic tag rule would identify it as a tag.
    *
    * Pattern must only match prefixes, and if it matches a prefix and context
    * is null or matches the last non-comment token parsed, then that match is
    * considered a token with the same style.
    *
    * Context is applied to the last non-whitespace, non-comment token
    * recognized.
    *
    * Shortcut is an optional string of characters, any of which, if the first
    * character, gurantee that this pattern and only this pattern matches.
    *
    * @param {Array} shortcutStylePatterns patterns that always start with
    *   a known character.  Must have a shortcut string.
    * @param {Array} fallthroughStylePatterns patterns that will be tried in
    *   order if the shortcut ones fail.  May have shortcuts.
    *
    * @return {function (string, number?) : Array.<number|string>} a
    *   function that takes source code and returns a list of decorations.
    */
  function createSimpleLexer(shortcutStylePatterns,
                             fallthroughStylePatterns) {
    var shortcuts = {};
    (function () {
      var allPatterns = shortcutStylePatterns.concat(fallthroughStylePatterns);
      for (var i = allPatterns.length; --i >= 0;) {
        var patternParts = allPatterns[i];
        var shortcutChars = patternParts[3];
        if (shortcutChars) {
          for (var c = shortcutChars.length; --c >= 0;) {
            shortcuts[shortcutChars.charAt(c)] = patternParts;
          }
        }
      }
    })();

    var nPatterns = fallthroughStylePatterns.length;
    var notWs = /\S/;

    var decorate = function (sourceCode, opt_basePos) {
      opt_basePos = opt_basePos || 0;
      var decorations = [opt_basePos, PR_PLAIN];
      var lastToken = '';
      var pos = 0;  // index into sourceCode
      var tail = sourceCode;

      while (tail.length) {
        var style;
        var token = null;
        var match;

        var patternParts = shortcuts[tail.charAt(0)];
        if (patternParts) {
          match = tail.match(patternParts[1]);
          token = match[0];
          style = patternParts[0];
        } else {
          for (var i = 0; i < nPatterns; ++i) {
            patternParts = fallthroughStylePatterns[i];
            var contextPattern = patternParts[2];
            if (contextPattern && !contextPattern.test(lastToken)) {
              // rule can't be used
              continue;
            }
            match = tail.match(patternParts[1]);
            if (match) {
              token = match[0];
              style = patternParts[0];
              break;
            }
          }

          if (!token) {  // make sure that we make progress
            style = PR_PLAIN;
            token = tail.substring(0, 1);
          }
        }

        var isEmbedded = 'lang-' === style.substring(0, 5);
        if (isEmbedded && !(match && match[1])) {
          isEmbedded = false;
          style = PR_SOURCE;
        }
        if (!isEmbedded) {
          decorations.push(opt_basePos + pos, style);
        } else {  // Treat group 1 as an embedded block of source code.
          var embeddedSource = match[1];
          var embeddedSourceStart = token.indexOf(embeddedSource);
          var embeddedSourceEnd = embeddedSourceStart + embeddedSource.length;
          var lang = style.substring(5);
          if (!langHandlerRegistry.hasOwnProperty(lang)) {
            lang = /^\s*</.test(embeddedSource)
                ? 'default-markup'
                : 'default-code';
          }
          var size = decorations.length - 10;
          appendDecorations(
              opt_basePos + pos,
              token.substring(0, embeddedSourceStart),
              decorate, decorations);
          appendDecorations(
              opt_basePos + pos + embeddedSourceStart,
              token.substring(embeddedSourceStart, embeddedSourceEnd),
              langHandlerRegistry[lang], decorations);
          appendDecorations(
              opt_basePos + pos + embeddedSourceEnd,
              token.substring(embeddedSourceEnd),
              decorate, decorations);
        }
        pos += token.length;
        tail = tail.substring(token.length);
        if (style !== PR_COMMENT && notWs.test(token)) { lastToken = token; }
      }
      return decorations;
    };
    return decorate;
  }

  var PR_MARKUP_LEXER = createSimpleLexer([], [
      [PR_PLAIN,       /^[^<?]+/, null],
      [PR_DECLARATION, /^<!\w[^>]*(?:>|$)/, null],
      [PR_COMMENT,     /^<!--[\s\S]*?(?:-->|$)/, null],
       // Unescaped content in an unknown language
      ['lang-',        /^<\?([\s\S]+?)(?:\?>|$)/, null],
      ['lang-',        /^<%([\s\S]+?)(?:%>|$)/, null],
      [PR_PUNCTUATION, /^(?:<[%?]|[%?]>)/, null],
      ['lang-',        /^<xmp\b[^>]*>([\s\S]+?)<\/xmp\b[^>]*>/i, null],
      // Unescaped content in javascript.  (Or possibly vbscript).
      ['lang-js',      /^<script\b[^>]*>([\s\S]+?)<\/script\b[^>]*>/i, null],
      // Contains unescaped stylesheet content
      ['lang-css',     /^<style\b[^>]*>([\s\S]+?)<\/style\b[^>]*>/i, null],
      [PR_TAG,         /^<\/?\w[^<>]*>/, null]
      ]);
  // Splits any of the source|style|xmp entries above into a start tag,
  // source content, and end tag.
  var PR_SOURCE_CHUNK_PARTS = /^(<[^>]*>)([\s\S]*)(<\/[^>]*>)$/;
  /** split markup on tags, comments, application directives, and other top
    * level constructs.  Tags are returned as a single token - attributes are
    * not yet broken out.
    * @private
    */
  function tokenizeMarkup(source) {
    var decorations = PR_MARKUP_LEXER(source);
    for (var i = 0; i < decorations.length; i += 2) {
      if (decorations[i + 1] === PR_SOURCE) {
        var start, end;
        start = decorations[i];
        end = i + 2 < decorations.length ? decorations[i + 2] : source.length;
        // Split out start and end script tags as actual tags, and leave the
        // body with style SCRIPT.
        var sourceChunk = source.substring(start, end);
        var match = sourceChunk.match(PR_SOURCE_CHUNK_PARTS);
        if (match) {
          decorations.splice(
              i, 2,
              start, PR_TAG,  // the open chunk
              start + match[1].length, PR_SOURCE,
              start + match[1].length + (match[2] || '').length, PR_TAG);
        }
      }
    }
    return decorations;
  }

  var PR_TAG_LEXER = createSimpleLexer([
      [PR_ATTRIB_VALUE, /^\'[^\']*(?:\'|$)/, null, "'"],
      [PR_ATTRIB_VALUE, /^\"[^\"]*(?:\"|$)/, null, '"'],
      [PR_PUNCTUATION,  /^[<>\/=]+/, null, '<>/=']
      ], [
      [PR_TAG,          /^[\w:\-]+/, /^</],
      [PR_ATTRIB_VALUE, /^[\w\-]+/, /^=/],
      [PR_ATTRIB_NAME,  /^[\w:\-]+/, null],
      [PR_PLAIN,        /^\s+/, null, ' \t\r\n']
      ]);
  /** split tags attributes and their values out from the tag name, and
    * recursively lex source chunks.
    * @private
    */
  function splitTagAttributes(source, decorations) {
    for (var i = 0; i < decorations.length; i += 2) {
      var style = decorations[i + 1];
      if (style === PR_TAG) {
        var start, end;
        start = decorations[i];
        end = i + 2 < decorations.length ? decorations[i + 2] : source.length;
        var chunk = source.substring(start, end);
        var subDecorations = PR_TAG_LEXER(chunk, start);
        spliceArrayInto(subDecorations, decorations, i, 2);
        i += subDecorations.length - 2;
      }
    }
    return decorations;
  }

  /** returns a function that produces a list of decorations from source text.
    *
    * This code treats ", ', and ` as string delimiters, and \ as a string
    * escape.  It does not recognize perl's qq() style strings.
    * It has no special handling for double delimiter escapes as in basic, or
    * the tripled delimiters used in python, but should work on those regardless
    * although in those cases a single string literal may be broken up into
    * multiple adjacent string literals.
    *
    * It recognizes C, C++, and shell style comments.
    *
    * @param {Object} options a set of optional parameters.
    * @return {function (string) : Array.<string|number>} a
    *     decorator that takes sourceCode as plain text and that returns a
    *     decoration list
    */
  function sourceDecorator(options) {
    var shortcutStylePatterns = [], fallthroughStylePatterns = [];
    if (options['tripleQuotedStrings']) {
      // '''multi-line-string''', 'single-line-string', and double-quoted
      shortcutStylePatterns.push(
          [PR_STRING,  /^(?:\'\'\'(?:[^\'\\]|\\[\s\S]|\'{1,2}(?=[^\']))*(?:\'\'\'|$)|\"\"\"(?:[^\"\\]|\\[\s\S]|\"{1,2}(?=[^\"]))*(?:\"\"\"|$)|\'(?:[^\\\']|\\[\s\S])*(?:\'|$)|\"(?:[^\\\"]|\\[\s\S])*(?:\"|$))/,
           null, '\'"']);
    } else if (options['multiLineStrings']) {
      // 'multi-line-string', "multi-line-string"
      shortcutStylePatterns.push(
          [PR_STRING,  /^(?:\'(?:[^\\\']|\\[\s\S])*(?:\'|$)|\"(?:[^\\\"]|\\[\s\S])*(?:\"|$)|\`(?:[^\\\`]|\\[\s\S])*(?:\`|$))/,
           null, '\'"`']);
    } else {
      // 'single-line-string', "single-line-string"
      shortcutStylePatterns.push(
          [PR_STRING,
           /^(?:\'(?:[^\\\'\r\n]|\\.)*(?:\'|$)|\"(?:[^\\\"\r\n]|\\.)*(?:\"|$))/,
           null, '"\'']);
    }
    fallthroughStylePatterns.push(
        [PR_PLAIN,   /^(?:[^\'\"\`\/\#]+)/, null, ' \r\n']);
    if (options['hashComments']) {
      shortcutStylePatterns.push([PR_COMMENT, /^#[^\r\n]*/, null, '#']);
    }
    if (options['cStyleComments']) {
      fallthroughStylePatterns.push([PR_COMMENT, /^\/\/[^\r\n]*/, null]);
      fallthroughStylePatterns.push(
          [PR_COMMENT, /^\/\*[\s\S]*?(?:\*\/|$)/, null]);
    }
    if (options['regexLiterals']) {
      var REGEX_LITERAL = (
          // A regular expression literal starts with a slash that is
          // not followed by * or / so that it is not confused with
          // comments.
          '^/(?=[^/*])'
          // and then contains any number of raw characters,
          + '(?:[^/\\x5B\\x5C]'
          // escape sequences (\x5C),
          +    '|\\x5C[\\s\\S]'
          // or non-nesting character sets (\x5B\x5D);
          +    '|\\x5B(?:[^\\x5C\\x5D]|\\x5C[\\s\\S])*(?:\\x5D|$))+'
          // finally closed by a /.
          + '(?:/|$)');
      fallthroughStylePatterns.push(
          [PR_STRING, new RegExp(REGEX_LITERAL), REGEXP_PRECEDER_PATTERN]);
    }

    var keywords = wordSet(options['keywords']);

    options = null;

    /** splits the given string into comment, string, and "other" tokens.
      * @param {string} sourceCode as plain text
      * @return {Array.<number|string>} a decoration list.
      * @private
      */
    var splitStringAndCommentTokens = createSimpleLexer(
        shortcutStylePatterns, fallthroughStylePatterns);

    var styleLiteralIdentifierPuncRecognizer = createSimpleLexer([], [
        [PR_PLAIN,       /^\s+/, null, ' \r\n'],
        // TODO(mikesamuel): recognize non-latin letters and numerals in idents
        [PR_PLAIN,       /^[a-z_$@][a-z_$@0-9]*/i, null],
        // A hex number
        [PR_LITERAL,     /^0x[a-f0-9]+[a-z]/i, null],
        // An octal or decimal number, possibly in scientific notation
        [PR_LITERAL,
         /^(?:\d(?:_\d+)*\d*(?:\.\d*)?|\.\d+)(?:e[+\-]?\d+)?[a-z]*/i,
         null, '123456789'],
        [PR_PUNCTUATION, /^[^\s\w\.$@]+/, null]
        // Fallback will handle decimal points not adjacent to a digit
      ]);

    /** splits plain text tokens into more specific tokens, and then tries to
      * recognize keywords, and types.
      * @private
      */
    function splitNonStringNonCommentTokens(source, decorations) {
      for (var i = 0; i < decorations.length; i += 2) {
        var style = decorations[i + 1];
        if (style === PR_PLAIN) {
          var start, end, chunk, subDecs;
          start = decorations[i];
          end = i + 2 < decorations.length ? decorations[i + 2] : source.length;
          chunk = source.substring(start, end);
          subDecs = styleLiteralIdentifierPuncRecognizer(chunk, start);
          for (var j = 0, m = subDecs.length; j < m; j += 2) {
            var subStyle = subDecs[j + 1];
            if (subStyle === PR_PLAIN) {
              var subStart = subDecs[j];
              var subEnd = j + 2 < m ? subDecs[j + 2] : chunk.length;
              var token = source.substring(subStart, subEnd);
              if (token === '.') {
                subDecs[j + 1] = PR_PUNCTUATION;
              } else if (token in keywords) {
                subDecs[j + 1] = PR_KEYWORD;
              } else if (/^@?[A-Z][A-Z$]*[a-z][A-Za-z$]*$/.test(token)) {
                // classify types and annotations using Java's style conventions
                subDecs[j + 1] = token.charAt(0) === '@' ? PR_LITERAL : PR_TYPE;
              }
            }
          }
          spliceArrayInto(subDecs, decorations, i, 2);
          i += subDecs.length - 2;
        }
      }
      return decorations;
    }

    return function (sourceCode) {
      // Split into strings, comments, and other.
      // We do this because strings and comments are easily recognizable and can
      // contain stuff that looks like other tokens, so we want to mark those
      // early so we don't recurse into them.
      var decorations = splitStringAndCommentTokens(sourceCode);

      // Split non comment|string tokens on whitespace and word boundaries
      decorations = splitNonStringNonCommentTokens(sourceCode, decorations);

      return decorations;
    };
  }

  var decorateSource = sourceDecorator({
        'keywords': ALL_KEYWORDS,
        'hashComments': true,
        'cStyleComments': true,
        'multiLineStrings': true,
        'regexLiterals': true
      });

  /** identify attribute values that really contain source code and recursively
    * lex them.
    * @private
    */
  function splitSourceAttributes(source, decorations) {
    var nextValueIsSource = false;
    for (var i = 0; i < decorations.length; i += 2) {
      var style = decorations[i + 1];
      var start, end;
      if (style === PR_ATTRIB_NAME) {
        start = decorations[i];
        end = i + 2 < decorations.length ? decorations[i + 2] : source.length;
        nextValueIsSource = /^on|^style$/i.test(source.substring(start, end));
      } else if (style === PR_ATTRIB_VALUE) {
        if (nextValueIsSource) {
          start = decorations[i];
          end = i + 2 < decorations.length ? decorations[i + 2] : source.length;
          var attribValue = source.substring(start, end);
          var attribLen = attribValue.length;
          var quoted =
              (attribLen >= 2 && /^[\"\']/.test(attribValue) &&
               attribValue.charAt(0) === attribValue.charAt(attribLen - 1));

          var attribSource;
          var attribSourceStart;
          var attribSourceEnd;
          if (quoted) {
            attribSourceStart = start + 1;
            attribSourceEnd = end - 1;
            attribSource = attribValue;
          } else {
            attribSourceStart = start + 1;
            attribSourceEnd = end - 1;
            attribSource = attribValue.substring(1, attribValue.length - 1);
          }

          var attribSourceDecorations = decorateSource(attribSource);
          for (var j = 0, m = attribSourceDecorations.length; j < m; j += 2) {
            attribSourceDecorations[j] += attribSourceStart;
          }

          if (quoted) {
            attribSourceDecorations.push(attribSourceEnd, PR_ATTRIB_VALUE);
            spliceArrayInto(attribSourceDecorations, decorations, i + 2, 0);
          } else {
            spliceArrayInto(attribSourceDecorations, decorations, i, 2);
          }
        }
        nextValueIsSource = false;
      }
    }
    return decorations;
  }

  /** returns a decoration list given a string of markup.
    *
    * This code recognizes a number of constructs.
    * <!-- ... --> comment
    * <!\w ... >   declaration
    * <\w ... >    tag
    * </\w ... >   tag
    * <?...?>      embedded source
    * <%...%>      embedded source
    * &[#\w]...;   entity
    *
    * It does not recognizes %foo; doctype entities from  .
    *
    * It will recurse into any <style>, <script>, and on* attributes using
    * PR_lexSource.
    */
  function decorateMarkup(sourceCode) {
    // This function works as follows:
    // 1) Start by splitting the markup into text and tag chunks
    //    Input:  string s
    //    Output: List<PR_Token> where style in (PR_PLAIN, null)
    // 2) Then split the text chunks further into comments, declarations,
    //    tags, etc.
    //    After each split, consider whether the token is the start of an
    //    embedded source section, i.e. is an open <script> tag.  If it is, find
    //    the corresponding close token, and don't bother to lex in between.
    //    Input:  List<string>
    //    Output: List<PR_Token> with style in
    //            (PR_TAG, PR_PLAIN, PR_SOURCE, null)
    // 3) Finally go over each tag token and split out attribute names and
    //    values.
    //    Input:  List<PR_Token>
    //    Output: List<PR_Token> where style in
    //            (PR_TAG, PR_PLAIN, PR_SOURCE, NAME, VALUE, null)
    var decorations = tokenizeMarkup(sourceCode);
    decorations = splitTagAttributes(sourceCode, decorations);
    decorations = splitSourceAttributes(sourceCode, decorations);
    return decorations;
  }

  /**
    * @param {string} sourceText plain text
    * @param {Array.<number|string>} extractedTags chunks of raw html preceded
    *   by their position in sourceText in order.
    * @param {Array.<number|string>} decorations style classes preceded by their
    *   position in sourceText in order.
    * @return {string} html
    * @private
    */
  function recombineTagsAndDecorations(sourceText, extractedTags, decorations) {
    var html = [];
    // index past the last char in sourceText written to html
    var outputIdx = 0;

    var openDecoration = null;
    var currentDecoration = null;
    var tagPos = 0;  // index into extractedTags
    var decPos = 0;  // index into decorations
    var tabExpander = makeTabExpander(window['PR_TAB_WIDTH']);

    var adjacentSpaceRe = /([\r\n ]) /g;
    var startOrSpaceRe = /(^| ) /gm;
    var newlineRe = /\r\n?|\n/g;
    var trailingSpaceRe = /[ \r\n]$/;
    var lastWasSpace = true;  // the last text chunk emitted ended with a space.

    // A helper function that is responsible for opening sections of decoration
    // and outputing properly escaped chunks of source
    function emitTextUpTo(sourceIdx) {
      if (sourceIdx > outputIdx) {
        if (openDecoration && openDecoration !== currentDecoration) {
          // Close the current decoration
          html.push('</span>');
          openDecoration = null;
        }
        if (!openDecoration && currentDecoration) {
          openDecoration = currentDecoration;
          html.push('<span class="', openDecoration, '">');
        }
        // This interacts badly with some wikis which introduces paragraph tags
        // into pre blocks for some strange reason.
        // It's necessary for IE though which seems to lose the preformattedness
        // of <pre> tags when their innerHTML is assigned.
        // http://stud3.tuwien.ac.at/~e0226430/innerHtmlQuirk.html
        // and it serves to undo the conversion of <br>s to newlines done in
        // chunkify.
        var htmlChunk = textToHtml(
            tabExpander(sourceText.substring(outputIdx, sourceIdx)))
            .replace(lastWasSpace
                     ? startOrSpaceRe
                     : adjacentSpaceRe, '$1&nbsp;');
        // Keep track of whether we need to escape space at the beginning of the
        // next chunk.
        lastWasSpace = trailingSpaceRe.test(htmlChunk);
        html.push(htmlChunk.replace(newlineRe, '<br>'));
        outputIdx = sourceIdx;
      }
    }

    while (true) {
      // Determine if we're going to consume a tag this time around.  Otherwise
      // we consume a decoration or exit.
      var outputTag;
      if (tagPos < extractedTags.length) {
        if (decPos < decorations.length) {
          // Pick one giving preference to extractedTags since we shouldn't open
          // a new style that we're going to have to immediately close in order
          // to output a tag.
          outputTag = extractedTags[tagPos] <= decorations[decPos];
        } else {
          outputTag = true;
        }
      } else {
        outputTag = false;
      }
      // Consume either a decoration or a tag or exit.
      if (outputTag) {
        emitTextUpTo(extractedTags[tagPos]);
        if (openDecoration) {
          // Close the current decoration
          html.push('</span>');
          openDecoration = null;
        }
        html.push(extractedTags[tagPos + 1]);
        tagPos += 2;
      } else if (decPos < decorations.length) {
        emitTextUpTo(decorations[decPos]);
        currentDecoration = decorations[decPos + 1];
        decPos += 2;
      } else {
        break;
      }
    }
    emitTextUpTo(sourceText.length);
    if (openDecoration) {
      html.push('</span>');
    }

    return html.join('');
  }

  /** Maps language-specific file extensions to handlers. */
  var langHandlerRegistry = {};
  /** Register a language handler for the given file extensions.
    * @param {function (string) : Array.<number|string>} handler
    *     a function from source code to a list of decorations.
    * @param {Array.<string>} fileExtensions
    */
  function registerLangHandler(handler, fileExtensions) {
    for (var i = fileExtensions.length; --i >= 0;) {
      var ext = fileExtensions[i];
      if (!langHandlerRegistry.hasOwnProperty(ext)) {
        langHandlerRegistry[ext] = handler;
      } else if ('console' in window) {
        console.log('cannot override language handler %s', ext);
      }
    }
  }
  registerLangHandler(decorateSource, ['default-code']);
  registerLangHandler(
      decorateMarkup,
      ['default-markup', 'htm', 'html', 'mxml', 'xhtml', 'xml', 'xsl']);
  registerLangHandler(sourceDecorator({
          'keywords': CPP_KEYWORDS,
          'hashComments': true,
          'cStyleComments': true
          }), ['c', 'cc', 'cpp', 'cxx', 'cyc', 'm']);
  registerLangHandler(sourceDecorator({
          'keywords': CSHARP_KEYWORDS,
          'hashComments': true,
          'cStyleComments': true
        }), ['cs']);
  registerLangHandler(sourceDecorator({
          'keywords': JAVA_KEYWORDS,
          'cStyleComments': true
        }), ['java']);
  registerLangHandler(sourceDecorator({
          'keywords': SH_KEYWORDS,
          'hashComments': true,
          'multiLineStrings': true
        }), ['bsh', 'csh', 'sh']);
  registerLangHandler(sourceDecorator({
          'keywords': PYTHON_KEYWORDS,
          'hashComments': true,
          'multiLineStrings': true,
          'tripleQuotedStrings': true
        }), ['cv', 'py']);
  registerLangHandler(sourceDecorator({
          'keywords': PERL_KEYWORDS,
          'hashComments': true,
          'multiLineStrings': true,
          'regexLiterals': true
        }), ['perl', 'pl', 'pm']);
  registerLangHandler(sourceDecorator({
          'keywords': RUBY_KEYWORDS,
          'hashComments': true,
          'multiLineStrings': true,
          'regexLiterals': true
        }), ['rb']);
  registerLangHandler(sourceDecorator({
          'keywords': JSCRIPT_KEYWORDS,
          'cStyleComments': true,
          'regexLiterals': true
        }), ['js']);

  function prettyPrintOne(sourceCodeHtml, opt_langExtension) {
    try {
      // Extract tags, and convert the source code to plain text.
      var sourceAndExtractedTags = extractTags(sourceCodeHtml);
      /** Plain text. @type {string} */
      var source = sourceAndExtractedTags.source;

      /** Even entries are positions in source in ascending order.  Odd entries
        * are tags that were extracted at that position.
        * @type {Array.<number|string>}
        */
      var extractedTags = sourceAndExtractedTags.tags;

      // Pick a lexer and apply it.
      if (!langHandlerRegistry.hasOwnProperty(opt_langExtension)) {
        // Treat it as markup if the first non whitespace character is a < and
        // the last non-whitespace character is a >.
        opt_langExtension =
            /^\s*</.test(source) ? 'default-markup' : 'default-code';
      }

      /** Even entries are positions in source in ascending order.  Odd enties
        * are style markers (e.g., PR_COMMENT) that run from that position until
        * the end.
        * @type {Array.<number|string>}
        */
      var decorations = langHandlerRegistry[opt_langExtension].call({}, source);

      // Integrate the decorations and tags back into the source code to produce
      // a decorated html string.
      return recombineTagsAndDecorations(source, extractedTags, decorations);
    } catch (e) {
      if ('console' in window) {
        console.log(e);
        console.trace();
      }
      return sourceCodeHtml;
    }
  }

  function prettyPrint(opt_whenDone) {
    var isIE6 = window['_pr_isIE6']();

    // fetch a list of nodes to rewrite
    var codeSegments = [
        document.getElementsByTagName('pre'),
        document.getElementsByTagName('code'),
        document.getElementsByTagName('xmp') ];
    var elements = [];
    for (var i = 0; i < codeSegments.length; ++i) {
      for (var j = 0, n = codeSegments[i].length; j < n; ++j) {
        elements.push(codeSegments[i][j]);
      }
    }
    codeSegments = null;

    // the loop is broken into a series of continuations to make sure that we
    // don't make the browser unresponsive when rewriting a large page.
    var k = 0;

    function doWork() {
      var endTime = (window['PR_SHOULD_USE_CONTINUATION'] ?
                     new Date().getTime() + 250 /* ms */ :
                     Infinity);
      for (; k < elements.length && new Date().getTime() < endTime; k++) {
        var cs = elements[k];
        if (cs.className && cs.className.indexOf('prettyprint') >= 0) {
          // If the classes includes a language extensions, use it.
          // Language extensions can be specified like
          //     <pre class="prettyprint lang-cpp">
          // the language extension "cpp" is used to find a language handler as
          // passed to PR_registerLangHandler.
          var langExtension = cs.className.match(/\blang-(\w+)\b/);
          if (langExtension) { langExtension = langExtension[1]; }

          // make sure this is not nested in an already prettified element
          var nested = false;
          for (var p = cs.parentNode; p; p = p.parentNode) {
            if ((p.tagName === 'pre' || p.tagName === 'code' ||
                 p.tagName === 'xmp') &&
                p.className && p.className.indexOf('prettyprint') >= 0) {
              nested = true;
              break;
            }
          }
          if (!nested) {
            // fetch the content as a snippet of properly escaped HTML.
            // Firefox adds newlines at the end.
            var content = getInnerHtml(cs);
            content = content.replace(/(?:\r\n?|\n)$/, '');

            // do the pretty printing
            var newContent = prettyPrintOne(content, langExtension);

            // push the prettified html back into the tag.
            if (!isRawContent(cs)) {
              // just replace the old html with the new
              cs.innerHTML = newContent;
            } else {
              // we need to change the tag to a <pre> since <xmp>s do not allow
              // embedded tags such as the span tags used to attach styles to
              // sections of source code.
              var pre = document.createElement('PRE');
              for (var i = 0; i < cs.attributes.length; ++i) {
                var a = cs.attributes[i];
                if (a.specified) {
                  var aname = a.name.toLowerCase();
                  if (aname === 'class') {
                    pre.className = a.value;  // For IE 6
                  } else {
                    pre.setAttribute(a.name, a.value);
                  }
                }
              }
              pre.innerHTML = newContent;

              // remove the old
              cs.parentNode.replaceChild(pre, cs);
              cs = pre;
            }

            // Replace <br>s with line-feeds so that copying and pasting works
            // on IE 6.
            // Doing this on other browsers breaks lots of stuff since \r\n is
            // treated as two newlines on Firefox, and doing this also slows
            // down rendering.
            if (isIE6 && cs.tagName === 'PRE') {
              var lineBreaks = cs.getElementsByTagName('br');
              for (var j = lineBreaks.length; --j >= 0;) {
                var lineBreak = lineBreaks[j];
                lineBreak.parentNode.replaceChild(
                    document.createTextNode('\r\n'), lineBreak);
              }
            }
          }
        }
      }
      if (k < elements.length) {
        // finish up in a continuation
        setTimeout(doWork, 250);
      } else if (opt_whenDone) {
        opt_whenDone();
      }
    }

    doWork();
  }

  window['PR_normalizedHtml'] = normalizedHtml;
  window['prettyPrintOne'] = prettyPrintOne;
  window['prettyPrint'] = prettyPrint;
  window['PR'] = {
        'createSimpleLexer': createSimpleLexer,
        'registerLangHandler': registerLangHandler,
        'sourceDecorator': sourceDecorator,
        'PR_ATTRIB_NAME': PR_ATTRIB_NAME,
        'PR_ATTRIB_VALUE': PR_ATTRIB_VALUE,
        'PR_COMMENT': PR_COMMENT,
        'PR_DECLARATION': PR_DECLARATION,
        'PR_KEYWORD': PR_KEYWORD,
        'PR_LITERAL': PR_LITERAL,
        'PR_NOCODE': PR_NOCODE,
        'PR_PLAIN': PR_PLAIN,
        'PR_PUNCTUATION': PR_PUNCTUATION,
        'PR_SOURCE': PR_SOURCE,
        'PR_STRING': PR_STRING,
        'PR_TAG': PR_TAG,
        'PR_TYPE': PR_TYPE
      };
})();

// END: prettify.js

// BEGIN: REGEX selector http://james.padolsey.com/javascript/regex-selector-for-jquery/
jQuery.expr[':'].regex = function(elem, index, match) {
    var matchParams = match[3].split(','),
        validLabels = /^(data|css):/,
        attr = {
            method: matchParams[0].match(validLabels) ?
                        matchParams[0].split(':')[0] : 'attr',
            property: matchParams.shift().replace(validLabels, '')
        },
        regexFlags = 'ig',
        regex = new RegExp(matchParams.join('').replace(/^\s+|\s+$/g, ''), regexFlags);
    return regex.test(jQuery(elem)[attr.method](attr.property));
}

// END: REGEX selector