var objActiveMenu;
var tmeTimer;

function showMenu( strName )
{
	stopTimer();

	if( objActiveMenu )
		objActiveMenu.style.visibility = "hidden";

	objActiveMenu = document.getElementById( strName );
	
	if(objActiveMenu)
		objActiveMenu.style.visibility = "visible";
}

function hideMenu()
{
	if( objActiveMenu )
		objActiveMenu.style.visibility = "hidden";
	
	objActiveMenu = null;
}

function startTimer()
{
	tmeTimer = setTimeout("hideMenu()", 2*1000);
}

function stopTimer()
{
	if( tmeTimer )
		clearTimeout( tmeTimer );
}