function preloader() 
{
	var wartezeit = 1000;
	time = new Date();
	var vergangen = time + wartezeit;

	if( time >= wartezeit)
	{
		if (document.getElementById) 
		{  // DOM3 = IE5, NS6
		document.getElementById('preloader').style.visibility = 'hidden';
		}
			else 
			{
				if (document.layers) 
				{  // Netscape 4
				document.preloader.visibility = 'hidden';
				}
					else 
					{  // IE 4
					document.all.preloader.style.visibility = 'hidden';
      		}
   		}
		}
}