function expandcollapse(obj)
{
 
	objHeader = eval('header_' + obj);
	objFooter = eval('footer_' + obj);
	
	
		
	if(objHeader.style.visibility == "hidden")
		{
			objHeader.style.visibility = "visible";
			objFooter.style.visibility = "visible";
			objHeader.style.display = "block";
			objFooter.style.display = "block";
		}
	else
		{
			objHeader.style.visibility = "hidden";
			objFooter.style.visibility = "hidden";
			objHeader.style.display = "none";
			objFooter.style.display = "none";
		}
}