function openMenu(id){
		document.getElementById(id).style.display = "block";
		document.getElementById(id+'_mid').style.backgroundImage = "url('/webblocks/layout/images/menu_over_mid.jpg')";
		document.getElementById(id+'_right').style.backgroundImage = "url('/webblocks/layout/images/menu_over_right.jpg')";
		document.getElementById(id+'_left').style.backgroundImage = "url('/webblocks/layout/images/menu_over_left.jpg')";
		
}
function closeMenu(id){

		document.getElementById(id).style.display = "none";
		document.getElementById(id+'_mid').style.backgroundImage = "";
		document.getElementById(id+'_right').style.backgroundImage = "";
		document.getElementById(id+'_left').style.backgroundImage = "";
}