function windowSize()  {
	//* Browsercheck
	ns4 = (document.layers)? true:false;
	ie4	= (document.all)? true:false;
	ns6 = (!document.layers) && (navigator.userAgent.indexOf('Netscape')!=-1)?true:false;
	
	//* Internet Explorer:
	if (ie4)  {
		var MainHeight = document.body.clientHeight - 229 + "px";
		document.all['content'].style.height = MainHeight;
		
		var strepenHeight = document.body.clientHeight - 186 + "px";
		document.all['strepen'].style.height = strepenHeight;
	}
	//* NS 6
	else if (ns6)  {
		var MainHeight = window.innerHeight - 229 + "px";
		document.getElementById('content').style.height = MainHeight;
		
		var strepenHeight = window.innerHeight - 186 + "px";
		document.getElementById('strepen').style.height = strepenHeight;
	}
}