// Copyright 2006-2007 javascript-array.com

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

// open hidden layer
function mopen(id, header)
{	
	// cancel close timer
	mcancelclosetime();

	// close old layer
	mclose();

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

	if (header)
	{
		ddheader = header;
		ddheader.style.color = '#ffff66';
		ddheader.style.backgroundColor = '#153e7e';
	}
}

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

	if (ddheader)
	{
		ddheader.style.color = '#153e7e';
		ddheader.style.backgroundColor = '#ffff66';
	}
}

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

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

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