function kontakt(URL,name,attrib)
 {
   var win;  
   win=window.open('kontakt.htm','Add','width=400 ,height=300, screenX=0,screenY=0'); 
   win.moveTo((screen.width-400)/2,(screen.height-300)/3);  
 }
 
 function vertretung(URL,name,attrib)
 {
   var win;  
   win=window.open('vertretung.htm','Ver','width=400 ,height=300, screenX=0,screenY=0'); 
   win.moveTo((screen.width-400)/2,(screen.height-300)/3);  
 }