function popdown()
{
 var breite=800;
 var hoehe=600;
 var positionX=((screen.availWidth / 2) - breite / 2);
 var positionY=((screen.availHeight / 2) - hoehe / 2);
 var url='http://www.geschenke-4all.de';
 pop=window.open('','','toolbar=1,location=1,directories=1,status=1,menubar=1,scrollbars=1,resizable=1,fullscreen=0,width='+breite+',height='+hoehe+',top=10000,left=10000');
 pop.resizeTo(breite,hoehe);
 pop.moveTo(positionX,positionY);
 pop.location=url;
 }