an infinite scroll script repaired ... probably broken before because of tumblr change

infinity2.js

var tumblrAutoPager={url:"/web/20150212183510/http://proto.jp/",ver:"0.1.7",rF:true,gP:{},pp:null,ppId:"",LN:location.hostname,init:function(){if($("autopagerize_icon")||navigator.userAgent.indexOf('iPhone')!=-1)return;
var tAP=tumblrAutoPager;
var p=1;
var lh=location.href;
var lhp=lh.lastIndexOf("/page/");
var lht=lh.lastIndexOf("/tagged/");
if(lhp!=-1){p=parseInt(lh.slice(lhp+6));
	tAP.LN=lh.slice(7,lhp);
}else if(lht!=-1){tAP.LN=lh.slice(7);
	if(tAP.LN.slice(tAP.LN.length-1)=="/")tAP.LN=tAP.LN.slice(0,tAP.LN.length-1);
}else if("http://"+tAP.LN+"/"!=lh){return;
};
var gPFncs=[];
gPFncs[0]=function(aE){
	var r=[];
	for(var i=0,l=aE.length;i<l;i++){
			if(aE[i].className=="autopagerize_page_element"){
				console.log("found autopagerize_page_element");
				r=gCE(aE[i]);
				break;
			}
	}
return r;
};
gPFncs[1]=function(aE){var r=[];
	for(var i=0,l=aE.length;
		i<l;
		i++){var arr=aE[i].className?aE[i].className.split(" "):null;
		if(arr){for(var j=0;
			j<arr.length;
			j++){arr[j]=="post"?r.push(aE[i]):null;
}}}
return r;
};
gPFncs[2]=function(aE){var r=[];
	var tmpId=tAP.ppId?[tAP.ppId]:["posts","main","container","content","apDiv2","wrapper","projects"];
	for(var i=0,l=aE.length;
		i<l;
		i++){for(var j=0;
			j<tmpId.length;
			j++){if(aE[i].id==tmpId[j]){r=gCE(aE[i]);
			tAP.ppId=aE[i].id;
			break;
		}}}
		return r;
	};
	for(var i=0;
		i<gPFncs.length;
		i++){var getElems=gPFncs[i](document.body.getElementsByTagName('*'));
		if(getElems.length){tAP.gP=gPFncs[i];
			tAP.pp=getElems[0].parentNode;
			break;
		}}
		function gCE(pElem){var r=[];
			for(var i=0,l=pElem.childNodes.length;
				i<l;
				i++){r.push(pElem.childNodes.item(i))}
				return r;
		}
		if(!tAP.pp){return;
		}
		sendRequest.README={license:'Public Domain',url:'/web/20150212183510/http://jsgt.org/lib/ajax/ref.htm',version:0.516,author:'Toshiro Takahashi'};
		function chkAjaBrowser(){var A,B=navigator.userAgent;
			this.bw={safari:((A=B.split('AppleWebKit/')[1])?A.split('(')[0].split('.')[0]:0)>=124,konqueror:((A=B.split('Konqueror/')[1])?A.split(';')[0]:0)>=3.3,mozes:((A=B.split('Gecko/')[1])?A.split(' ')[0]:0)>=20011128,opera:(!!window.opera)&&((typeof XMLHttpRequest)=='function'),msie:(!!window.ActiveXObject)?(!!createHttpRequest()):false};
			return(this.bw.safari||this.bw.konqueror||this.bw.mozes||this.bw.opera||this.bw.msie)}
			function createHttpRequest(){if(window.XMLHttpRequest){return new XMLHttpRequest()}else{if(window.ActiveXObject){try{return new ActiveXObject('Msxml2.XMLHTTP')}catch(B){try{return new ActiveXObject('Microsoft.XMLHTTP')}catch(A){return null}}}else{return null}}};
			function sendRequest(E,R,C,D,F,G,S,A){var Q=C.toUpperCase()=='GET',H=createHttpRequest();
			if(H==null){return null}
				if((G)?G:false){D+=((D.indexOf('?')==-1)?'?':'&')+'t='+(new Date()).getTime()}
					var P=new chkAjaBrowser(),L=P.bw.opera,I=P.bw.safari,N=P.bw.konqueror,M=P.bw.mozes;
				if(typeof E=='object'){var J=E.onload;
					var O=E.onbeforsetheader}else{var J=E;
						var O=null}
						if(L||I||M){H.onload=function(){J(H);
							H.abort()}}else{H.onreadystatechange=function(){if(H.readyState==4){J(H);
								H.abort()}}}
								R=K(R,D);
								if(Q){D+=((D.indexOf('?')==-1)?'?':(R=='')?'':'&')+R}
									H.open(C,D,F,S,A);
								if(!!O){O(H)}
									B(H);
								H.send(R);
								function B(T){
									if(!L||typeof T.setRequestHeader=='function'){T.setRequestHeader('Content-Type','application/x-www-form-urlencoded;charset=UTF-8')}
									return T}

									function K(X,V)	{
										var Z=[];

										if(typeof X=='object'){for(var W in X){Y(W,X[W])}}else{if(typeof X=='string'){if(X==''){return''}
											if(X.charAt(0)=='&'){X=X.substring(1,X.length)}
												var T=X.split('&');
											for(var W=0;
												W<T.length;
												W++){var U=T[W].split('=');
												Y(U[0],U[1])}}}
											function Y(b,a){Z.push(encodeURIComponent(b)+'='+encodeURIComponent(a))}
											return Z.join('&')}
											return H}

											function addNextPage(oj){
													console.log("adding posts?");
												if(oj.status==404){
													console.log("404 error");
													tAP.remainFlg=false;
													return;
												}
												var d=document.createElement("div");
												d.innerHTML=oj.responseText;
												var posts=tAP.gP(d.getElementsByTagName("*"));
												
												//not sure what the purpose of checking posts.length is, but i had to comment it out to repair infinite scrolling
												/*
												if(posts.length<2){
													console.log("posts.length under 2?")
													tAP.rF=false;
													return;
												}
												*/
												d=document.createElement("div");
												d.className="tumblrAutoPager_page_info";
												tAP.pp.appendChild(d);
												for(var i=0;i<posts.length;i++){
													tAP.pp.appendChild(posts[i]);
												}
											var footer=$("footer");
											footer?footer.parentNode.appendChild(footer):null;
											tAP.rF=true;
										}
										watch_scroll();


										function watch_scroll(){var d=document.compatMode=="BackCompat"?document.body:document.documentElement;
										var r=d.scrollHeight-d.clientHeight-(d.scrollTop||document.body.scrollTop);
										if(r<d.clientHeight*2 && tAP.rF){
											tAP.rF=false;
											p++;
											addNextPageWithLikes = function(oj) {
												addNextPage(oj);
												Tumblr.LikeButton.get_status_by_page(p);
											}

											sendRequest(addNextPageWithLikes,"","GET","http://"+tAP.LN+"/page/"+p,true);


										}
										setTimeout(arguments.callee,200);
									};
									function $(id){return document.getElementById(id)};
								},switchAutoPage:function(){this.rF=!this.rF;
									var aE=document.getElementsByTagName('*');
									for(var i=0,l=aE.length;
										i<l;
										i++){if(aE[i].className=="tAP_switch"){aE[i].firstChild.nodeValue=this.rF?"AutoPage[OFF]":"AutoPage[ON]";
								}}}};
							window.addEventListener?window.addEventListener('load',tumblrAutoPager.init,false):window.attachEvent?window.attachEvent("onload",tumblrAutoPager.init):window.onload=tumblrAutoPager.init;