function xhtmlHeight()
	{
		
		var top=document.getElementById("top").offsetTop;
		var bottom=document.getElementById("bottom").offsetTop;
		var height=bottom-top;
		
		var top1=document.getElementById("top1").offsetTop;
		var bottom1=document.getElementById("bottom1").offsetTop;
		var height1=bottom1-top1;
		
		if(height<=700)
			height=700;
		
		
		if(document.getElementById("height1")) 
			document.getElementById("height1").style.height=height-height1+'px';
		
		if(document.getElementById("height2")) 
			document.getElementById("height2").style.height=height-0+'px';
			
		if(document.getElementById("height3")) 
			document.getElementById("height3").style.height=height+'px';

}