function expandDivToBottom ()
{
	//var screen_width = 0;
	var screen_height = 0;
	if(typeof(window.innerHeight) == 'number')
	{
		//alert("W Netscape compliant");
		//screen_width = window.innerWidth;
		screen_height = window.innerHeight;
		//alert("1");
	}
	else if(document.body.clientHeight)
	{
		//alert("W DOM compliant");
		//screen_width = document.body.clientWidth;
		screen_height = document.getElementById("iefixdiv").clientHeight;
		//alert("2 "+screen_height);
	}
	else if(document.documentElement.clientHeight)
	{
		//alert("W IE6 standards compliant mode");
		//screen_width = document.documentElement.clientWidth;
		screen_height = document.documentElement.clientHeight;
		//alert("3");
	}
	//alert(screen_height+"-"+document.getElementById('head').style.height.replace('px','')+"-"+document.getElementById('content').style.height.replace('px',''));
	var new_height = screen_height-document.getElementById('head').style.height.replace('px','')-document.getElementById('content').style.height.replace('px','');
	if(new_height > 160) document.getElementById('footer').style.height = new_height+"px";
}