function openPopup(page,width,height){
if (typeof(width) == "undefined")
width=300;
if (typeof(height) == "undefined")
height=300;
var fenstername = "popup";
var groesse = "width="+width+",height="+height+",top=100,left=100,scrollbars=yes";
popupwin = open(page,fenstername,groesse);
popupwin.focus();
}