Uncaught TypeError: Cannot read property 'toUpperCase' of null (script.js:4)

if(found){out.push(item);}});return out;};};OCSQSEARCH.UserState.prototype=new OCSQSEARCH.State.PROTO();OCSQSEARCH.userSelector=(function(){var _cache=new OCSQSEARCH.UserState();var ajaxTimeout,syncing=false;var node,esel2;var _settings={};var formatResult,formatSelection,getData,syncData,getDataFromCache,highlightTerm,getGroupSettings,normalizeText;getGroupSettings=function(group){return _settings.groups[group]||_settings.groupDefaults;};highlightTerm=function(term,text){var match=text.toUpperCase().indexOf(term.toUpperCase()),tl=term.length,markup=[];if(match<0){markup.push(text);}else{markup.push(text.substring(0,match));markup.push("<span class='esel2-match'>");markup.push(text.substring(match,match+tl));markup.push("</span>");markup.push(text.substring(match+tl,text.length));}return markup.join("");};formatResult=function(data,container,query){if(data.type=="msg")return'<div class="ow_small">'+data.text+'</div>';if(!data.id)return'<div class="ow_small ow_remark">'+data.text+'</div>';var html=$(data.html);html.find(".us-ddi-text").html("<span>"+highlightTerm(query.term,data.text)+"</span>");return html;};formatSelection=function(data,container){document.location.href=data.url;return data.text;};syncData=function(term,callback){syncing=true;$.getJSON(_settings.rspUrl,{term:term,context:_settings.context},function(data){syncing=false;if($.isFunction(callback))callback(data);_cache.mergeState(data);});};normalizeText=function(term){if(term==null){return term;}var accentMap={"à":"a","á":"a","â":"a","ã":"a","ä":"a","è":"e","é":"e","ê":"e","ë":"e","ì":"i","í":"i","î":"i","ñ":"n","ï":"i","ò":"o","ó":"o","ô":"o","õ":"o","ö":"o","ù":"u","ú":"u","û":"u","ü":"u","ý":"y","ÿ":"y"};var ret="";for(var i=0;i<term.length;i++){ret+=accentMap[term.charAt(i)]||term.charAt(i);}return ret;};getDataFromCache=function(term,count){count=count||10;var tmp;var out=[],groups={},orderedGroups=[],state=_cache.find(function(item){tmp=normalizeText(item.text).toUpperCase().indexOf(term.toUpperCase());if(tmp<0){tmp=normalizeText(item.info).toUpperCase().indexOf(term.toUpperCase());if(tmp<0){return false;}return true;}return true;});state.reverse();var groupsCount=0,lastGroup,val=esel2.val();$.each(state,function(id,item){if($.inArray(item.id.toString(),val)>=0||count==0){return;}count--;if(item.group){if(!groups[item.group]){groups[item.group]={text:item.group,children:[]};groupsCount++;lastGroup=item.group;}groups[item.group].children.push(item);}else{out.push(item);}});if(out.length>0||groupsCount>0){_settings.groups=_settings.groups||{};$.each(_settings.groups,function(groupName,groupSettings){if(!groups[groupName]&&groupSettings.alwaysVisible&&groupSettings.noMatchMessage){groups[groupName]={text:groupName,children:[{text:OW.getLanguageText(groupSettings.noMatchMessage.prefix,groupSettings.noMatchMessage.key,{"term":term}),type:'msg'}]};groupsCount++;}});}$.each(groups,function(i,group){orderedGroups.push(group);});orderedGroups.sort(function(a,b){var sA=getGroupSettings(a.text);var sB=getGroupSettings(b.text);return sA.priority-sB.priority;});if(lastGroup){var temp=groupsCount==1&&!getGroupSettings(lastGroup).alwaysVisible?groups[lastGroup].children:orderedGroups;$.each(temp,function(id,group){out.unshift(group);});}return out;};getData=function(options){var state=getDataFromCache(options.term);var sync=$.trim(options.term)&&!_cache.isSearched(options.term);if(sync){if(ajaxTimeout){window.clearTimeout(ajaxTimeout);}ajaxTimeout=window.setTimeout(function(){_cache.addKeyword(options.term);syncData(options.term);},300);}if((!sync||state.length)&&!syncing){options.callback({results:state});}};return{init:function(selector,settings,options,data){if($.isPlainObject(data)){_cache.setState(data);}_settings=settings;node=$(selector);node.esel2($.extend(options,{"query":getData,"formatResult":formatResult,"formatSelection":formatSelection,"formatNoMatches":function(term){return OW.getLanguageText('ocsqsearch','selector_no_matches',{"term":term});},"formatSearching":function(){return OW.getLanguageText('ocsqsearch','selector_searching');},formatInputTooShort:function(input,min){return OW.getLanguageText('ocsqsearch','input_too_short',{chars:(min-input.length)});},"postRender":function(term){var items=esel2.results.find(".esel2-result").length;if(items>0){esel2.results.append("<li class='esel2-more-results'><a href='"+_settings.viewAllUrl+"?term="+encodeURIComponent(term)+"'>"+OW.getLanguageText('ocsqsearch','view_all_results')+"</a></li>");}var $resultsCont=esel2.results.parent();if($resultsCont.css('background-color')=='transparent'){$resultsCont.css('background-color',$('#floatbox_prototype .floatbox_container .ow_bg_color').css('background-color'));}}}));node.next(".us-field-fake").hide();esel2=node.data().esel2;node.get(0).focus=function(){esel2.focusSearch();};_cache.observer.bind('change',function(){esel2.updateResults();});return esel2;}}})();OCSQSEARCH.UserSelectorFormElement=function(id,name){var formElement=new OwFormElement(id,name);formElement.init=function(selector,settings,options,data){formElement.esel2=OCSQSEARCH.userSelector.init(selector,settings,options,data);};formElement.resetValue=function(){formElement.esel2.data([]);};formElement.getValue=function(){return formElement.esel2.val();};formElement.setValue=function(val){formElement.esel2.data(val);};return formElement;};

Thank you