function webmailpopup() {
  if (window.document.getElementById('account').value == '' || window.document.getElementById('pwd').value == '') {    alert('Bitte geben Sie einen E-Mail Account und das zugehoerige Passwort ein.');return;
  }
  lp = (screen.width) ? (screen.width-800)/2 : 0;
  tp = (screen.height) ? (screen.height-550)/2 : 0;
  settings ="height=550,width=800,top=" + tp + ",left="+lp+",scrollbars=yes,status=yes,resizable=yes";
  var seite="http://domain.freenet.de/cgi-bin/lifesales/life-webmail.cgi?tld=.de&sld=kv-events&account="+window.document.getElementById('account').value+"&pwd="+window.document.getElementById('pwd').value+"&mandant=freenet&";
  webmail = window.open(seite,"webmail",settings);
  if (window.document.getElementById('account')) { window.document.getElementById('account').value=''; }
  if (window.document.getElementById('pwd')) { window.document.getElementById('pwd').value=''; }
  webmail.focus();
 }