function menu_dropdown(element) {
  if (document.getElementById('submenu-'+element).style.display == "none") {
    document.getElementById('submenu-'+element).style.display = "block";
    document.getElementById('submenu-'+element+'-icon').src = "gfx/icon-menudown.gif";
  } else {
    document.getElementById('submenu-'+element).style.display = "none";
    document.getElementById('submenu-'+element+'-icon').src = "gfx/icon-menu.gif";
  }
  return true;
}
function bookmark() {
  if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {
    var url="http://www.dialogticket.com/"
    var title="DialogTicket.com"
    window.external.AddFavorite(url,title)
  } else {
    var FavText = "Bitte http://www.dialogticket.com";
    if(navigator.appName == "Netscape") { FavText += " mit den Tasten STRG+D"; }
    FavText += " zu den Lesezeichen hinzufügen!";
    alert(FavText);
  }
}
function changedisplay(id) {
  e = document.getElementById(id);
  if (e.style.display == "block") e.style.display = "none";
  else e.style.display = "block";
  return true;
}