function EMail(s)
{
 var a = false;
 var res = false;
 if(typeof(RegExp) == 'function')
 {
  var b = new RegExp('abc');
  if(b.test('abc') == true){a = true;}
  }

 if(a == true)
 {
  reg = new RegExp('^([a-zA-Z0-9\\-\\.\\_]+)'+
                   '(\\@)([a-zA-Z0-9\\-\\.]+)'+
                   '(\\.)([a-zA-Z]{2,4})$');
  res = (reg.test(s));
 }
 else
 {
  res = (s.search('@') >= 1 &&
         s.lastIndexOf('.') > s.search('@') &&
         s.lastIndexOf('.') >= s.length-5)
 }
 return(res);
}

function f_kalender(form,sperrung,terminfeld,wochentagfeld,abotyp,left,top){
   window.open("kalender_popup.asp?form="+form+"&sperrung="+sperrung+"&feld="+terminfeld+"&wochentagfeld="+wochentagfeld+"&abotyp="+abotyp,"","width=240,height=190,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,titlebar=no,left="+left+",top="+top)
}