var menu_current, menu_timer;

function layer_show(name)
{
	if (document.layers)
	{
		if (document.layers[name])
			document.layers[name].visibility = "show";
	} else {
	   el = document.getElementById(name);
		if (el && el.style)
			el.style.visibility = "visible";
	}
}

function layer_hide(name)
{
	if (document.layers)
	{
		if (document.layers[name])
			document.layers[name].visibility = "hide";
	} else {
	   el = document.getElementById(name);
		if (el && el.style)
			el.style.visibility = "hidden";
	}
}


function ms(name)
{
	if (menu_current && menu_current != name)
		layer_hide(menu_current);
	menu_current = name;
	layer_show(menu_current);
	if ( menu_timer )
		clearTimeout(menu_timer);
	menu_timer = 0;
}


function mh(name)
{
	menu_timer = setTimeout('layer_hide(\''+name+'\')', 200);
}