function Oeffne_service(url)
{
  var UrlName = url;
  var Param = 'width=760,height=600,directories=0,location=0,menubar=1,resizable=1,scrollbars=1,status=0';

Fenster  = window.open(''+url+'', 'neuwin', Param);
Fenster.focus();

  return false;
}