function win2(Datei)
{
 var breite=505; 
 var hoehe=250; 
 var positionX=((screen.availWidth / 2) - breite / 2); 
 var positionY=((screen.availHeight / 2) - hoehe / 2); 
 var url=Datei; 
 pop=window.open('','','toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=0,fullscreen=0,width=500,height=440'); 
 pop.resizeTo(breite,hoehe); 
 pop.moveTo(positionX,positionY); 
 pop.location=url; 
 }