var waittime = 500;
var ext = "";
var pre = "images/";
var glob_name;
img = new Image();

function open_window (name,width,height) {
         fenster = window.open("bildpopup.html","Fenster1","width="+width+",height="+height+",status=yes,left=150,top=100");

         img.src = pre + name + ext;

         glob_name = pre + name + ext;
         }

function load_big_img () {
	document.getElementById("img01").src = window.opener.glob_name;
	}