// JavaScript Document
function scrol(){

 document.getElementById("popup").style.top=(document.body.scrollTop+document.body.clientHeight-document.getElementById("popup").offsetHeight)+"px";

 document.getElementById("popup").style.left=(document.body.scrollLeft+document.body.clientWidth-document.getElementById("popup").offsetWidth)+"px";

}

window.onscroll=scrol;

window.onresize=scrol;

window.onload=scrol;