function showmenu(elmnt)
{
	document.getElementById(elmnt).style.visibility="visible";
	document.getElementById(elmnt).style.display="block";
	document.getElementById(elmnt).parentNode.childNodes[1].style.backgroundColor="#000000";
}
function hidemenu(elmnt)
{
	document.getElementById(elmnt).style.visibility="hidden";
	document.getElementById(elmnt).style.display="none";
	document.getElementById(elmnt).parentNode.childNodes[1].style.backgroundColor="transparent";
}