function bookmark(url,title){
  if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {
  window.external.AddFavorite(url,title);
  } else if (navigator.appName == "Netscape") {
    window.sidebar.addPanel(title,url,"");
  } else {
    alert("Drück STRG-D (Netscape) or STRG-T (Opera) zum bookmarken");
  }
}

function Fensterhoehe()
{
if (window.innerHeight) return window.innerHeight;
else if (document.body && document.body.offsetHeight) return document.getElementsByTagName('html')[0].offsetHeight;
}
window.onresize = function() {
var hoehe = Fensterhoehe()-28;
document.getElementById("haupt").style.height = hoehe + 'px';
}