(function(){var seenPixels={};var reportedPixels={};var testId=null;if(typeof __trailheadTestCode!='undefined'){testId=__trailheadTestCode;}
var anchor='';var offsetX=0,offsetY=0;var img=new Image();var data=[];var cachedUpdates=[];var sendUpdates=false;var interval,killInterval;var ua=navigator&&navigator.userAgent;var ie=ua.match(/MSIE\s([^;]*)/);var scroll=function(){var dd=document.documentElement,db=document.body;if(dd&&(dd.scrollTop||dd.scrollLeft)){return[dd.scrollTop,dd.scrollLeft];}else if(db){return[db.scrollTop,db.scrollLeft];}else{return[0,0];}};function getStyle(oElm,strCssRule){var strValue="";if(document.defaultView&&document.defaultView.getComputedStyle){strValue=document.defaultView.getComputedStyle(oElm,"").getPropertyValue(strCssRule);}
else if(oElm.currentStyle){strCssRule=strCssRule.replace(/\-(\w)/g,function(strMatch,p1){return p1.toUpperCase();});strValue=oElm.currentStyle[strCssRule];}
return strValue;}
var pos=function(obj){var left,top;left=top=0;if(obj.offsetParent){do{left+=obj.offsetLeft;top+=obj.offsetTop;}while(obj=obj.offsetParent);}
return{x:left,y:top};};var getWidth=function(){var pageWidth=0;if(typeof(window.innerWidth)=='number'){pageWidth=window.innerWidth;}else if(document.documentElement&&document.documentElement.clientWidth){pageWidth=document.documentElement.clientWidth;}else if(document.body&&document.body.clientWidth){pageWidth=document.body.clientWidth;}
return pageWidth;};var getX=function(e){var ret=e.pageX;if(!ret&&0!==ret){ret=e.clientX||0;if(ie){ret+=scroll()[1];}}
return ret;};var getY=function(e){var ret=e.pageY;if(!ret&&0!==ret){ret=e.clientY||0;if(ie){ret+=scroll()[0];}}
return ret;};var handleMM=function(e){e=e||window.event;var x=getX(e),y=getY(e);var p=y*3000+x;if(!seenPixels[p]){seenPixels[p]=true;data.push(p);}};var handleClick=function(e){e=e||window.event;var x=getX(e),y=getY(e);var p=y*3000+x;data.push(-1*p);postData();}
var bind=function(){if(!document.body){setTimeout(bind,200);return;}
if(window.addEventListener){window.addEventListener('mousemove',handleMM,false);window.addEventListener('mouseover',handleMM,false);window.addEventListener('mouseout',handleMM,false);window.addEventListener('click',handleClick,true);window.addEventListener('unload',postData,false);}else if(window.attachEvent){document.body.attachEvent("onmousemove",handleMM);document.body.attachEvent("onmouseover",handleMM);document.body.attachEvent("onmouseout",handleMM);document.body.attachEvent("onclick",handleClick);window.attachEvent("onunload",postData);}};var postData=function(){if(data.length<=0){return;}
var d=data;data=[];var toPost=[];for(var i=0;i<d.length;i++){if(!reportedPixels[d[i]]){toPost.push(d[i]);reportedPixels[d[i]]=true;}}
if(toPost.length>0){var url='http://s1.trailheadapp.com/post/'+getWidth()+'/'+toPost.join(',');if(sendUpdates){img.src=url;}else{cachedUpdates.push(url);}}};bind();var maxScrollBottom=0;var scrollImg=new Image();var checkScroll=function(){var windowHeight=window.innerHeight?window.innerHeight:document.documentElement.clientHeight?document.documentElement.clientHeight:document.body.clientHeight;var sh=scroll()[0]
var s=sh+windowHeight;if(s>maxScrollBottom){maxScrollBottom=s;scrollImg.src='http://s1.trailheadapp.com/scroll/'+(testId ? testId : 'a')+'/'+maxScrollBottom;}}
interval=setInterval(postData,2000);killInterval=setTimeout(function(){__trailheadStop()},20000);var trackImage=new Image();trackImage.onload=function(){if(this.height==2){clearInterval(killInterval);sendUpdates=true;for(var i=0;i<cachedUpdates.length;i++){img.src=cachedUpdates[i];}
checkScroll();setInterval(checkScroll,2000);}else{clearInterval(interval);}}
if(testId){trackImage.src='http://s1.trailheadapp.com/check/'+testId+'/?zz='+new Date().getTime();}else{trackImage.src='http://s1.trailheadapp.com/controller/?zz='+new Date().getTime();}
window.__trailheadStop=function(){clearInterval(interval);if(window.removeEventListener){window.removeEventListener('mousemove',handleMM,false);window.removeEventListener('mouseover',handleMM,false);window.removeEventListener('mouseout',handleMM,false);window.removeEventListener('click',handleClick,true);window.removeEventListener('unload',postData,false);}else if(window.detachEvent){document.body.detachEvent("onmousemove",handleMM);document.body.detachEvent("onmouseover",handleMM);document.body.detachEvent("onmouseout",handleMM);document.body.detachEvent("onclick",handleClick);window.detachEvent("onunload",postData);}}
window.__trailheadServer='http://www.trailheadapp.com/';}())