// Copyright 2006-2007 javascript-array.com

var timeout	= 500;
var closetimer	= 0;
var ddmenuitem	= 0;

// open hidden layer
function m_open(id){	
	// cancel close timer
	m_cancel_close_time();

	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

	// get new layer and show it
	ddmenuitem = $(id);
	ddmenuitem.style.visibility = 'visible';

}

// close showed layer
function m_close(){
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

// go close timer
function m_close_time(){
	closetimer = window.setTimeout(m_close, timeout);
}

// cancel close timer
function m_cancel_close_time(){
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

// close layer when click-out
document.onclick = mclose;