function layerSize()  {
	//* 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 - 140 - 46 + "px";
		document.all['Main'].style.height = MainHeight;
		
		var BackHeight = document.body.clientHeight - 140 - 17 + "px";
		document.all['Back'].style.height = BackHeight;
	}
	//* NS 6
	else if (ns6)  {
		var MainHeight = window.innerHeight - 140 - 48 + "px";
		document.getElementById('Main').style.height = MainHeight;
		
		var MainHeight = window.innerHeight - 140 - 48 + "px";
		document.getElementById('Main').style.height = MainHeight;
	}
}