window.onload = function()
{
	if (navigator.appName == "Microsoft Internet Explorer")
   		var borderBottom = 150; //Rand, der unten frei gelassen wird.
    else
    	var borderBottom = 75;

    var availHeight = 600;

    if( window.innerHeight )
        availHeight = window.innerHeight;
    else if( document.documentElement && document.documentElement.clientHeight )
        availHeight = document.documentElement.clientHeight;
    else if(  document.body && document.body.clientHeight )
        availHeight = document.body.clientHeight;

    var content = document.getElementById('col3');
	if (content == null) return;

    var iframe = document.getElementById('resizemyheight');
	if (iframe == null) return;

    var setHeight = availHeight - content.offsetTop - borderBottom;
    iframe.style.height = setHeight + 'px';
}