function leasingaufruf(summe)
{
   if(summe != "")
   {
     window.open('http://www.grenkeleasing.de/cgi-bin/shop-index.pl?userid=015-09424&upreis='+summe,'LEASING','width=540,height=520,resizable=no,scrollbars=yes,toolbar=no,status=no,directories=no,menubar=no,location=no');
   } else {
     window.open('http://www.grenkeleasing.de/cgi-bin/shop-index.pl?userid=015-09424','LEASING','width=540,height=520,resizable=no,scrollbars=yes,toolbar=no,status=no,directories=no,menubar=no,location=no');
   }
}