function mainBodyHeight(obj)
{
	//alert(navigator.userAgent.indexOf("Safari"));
	
	objheight=document.getElementById(obj);
	var height=objheight.offsetHeight;
	//alert(height);
	if(height<500)
	{
		if(navigator.userAgent.indexOf("Firefox")!=-1)
		{
			objheight.style.height=500+'px';
		}
		else if(navigator.userAgent.indexOf("Safari")!=-1)
		{
			objheight.style.height=500+'px';
		}
		else
		{
			objheight.style.height=520+'px';
		}
	}
}