function toggleMenu()
{
	obj = document.getElementById("nav_links");
	if(!obj)
		return;
		
	if((obj.style.display == "none") || (obj.style.display == ""))
	{
		obj.style.display = "block";
		$("#menu_close").css("background-image","url(images/layout/menu_close.png)");
		$("#menu_close").attr("class","void");
	}
	else
	{
		obj.style.display = "none"; 
		$("#menu_close").css("background-image","url(images/layout/menu_top.png)");
	}
}