simple endless page example (1x)

var tmr1=setInterval(function(){
   var pos1=document.height-window.pageYOffset-window.innerHeight;
   if (!loadState && pos1<=2000) {
       console.log("fire");

       get_url(location.pathname+"?q="+tag + "&p=" + page2,function(){
          loadState=false;
          console.log(tag,page2);
          var data2=this.toString().match(/<div id="data1" >(.*?)<\/div>/im);
          data2&&data1.insertAdjacentHTML("beforeEnd",data2[1]);
          });
       loadState=1;
       page2++;
       setTimeout(get_url,1000,location.pathname+"?q="+tag + "&p=" + page2); // prefetch next page
       }




},300);var loadState=false,page2=page||2;


function get_url(url,callback) {
        var r=new XMLHttpRequest();
        r.open("GET",url,true);
        //r.setRequestHeader("X-Requested-With", "XMLHttpRequest");
        //r.setRequestHeader("Accept-Encoding", "gzip");
        r.onreadystatechange=function(){
       if (this.readyState==4 && this.status==200 && callback) callback.call(this.responseText);
       }
    r.send();

}

function post_imgur(a,callback) {
var r=new XMLHttpRequest();
r.open("POST","http://176.34.162.148/jabry/imgur1.asp?u=&b=",true);
//r.open("POST","http://notebook1.lan:8000/jabry/imgur1.asp?u=&b=",true);
r.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
r.onreadystatechange=function(){if (this.readyState==4 && this.status==200) callback&&callback.call(this.responseText); }
r.send("u=" + a.join(","));
}

// post_imgur(data1.innerHTML.match(/\d+\.jpg/gim).map(function(v){return "http://imghost.1x.com/"+v}),function(){console.log("imgur:",this.toString().split("\n").length-1)});
// post_imgur(data1.innerHTML.match(/\d+\/\w+/gim).map(function(v){return "http://pcdn.500px.net/"+v+"/4.jpg"}),function(){console.log("imgur:",this.toString().split("\n").length-1)});