function newWindow(url)
{
  var url =url;

  var breite = 700;
  //var hoehe
  //var breite = screen.availWidth - 100;
  var hoehe = screen.availHeight - 70;
  var Param = 'width='+breite+',height='+hoehe+',directories=0,location=0,menubar=0,resizable=0,scrollbars=1,status=0';
  Param += ',left='+(screen.width/2-breite/2)+',top=0';

  Fenster = window.open(url, "winName", Param);
  Fenster.focus();
}