// Copyright 2006-2007 javascript-array.com

var timeout	= 100;
var closetimer	= 0;
var ddmenuitem	= 0;
var ddmenuitem_btn = 0;

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

	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
  if(ddmenuitem_btn) ddmenuitem_btn.src = ddmenuitem_btn.src.replace(/-h./, '-n.');

	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';
  
}
// close showed layer
function mclose()
{
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
  if(ddmenuitem_btn) ddmenuitem_btn.src = ddmenuitem_btn.src.replace(/-h./, '-n.');
}

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

// cancel close timer
function mcancelclosetime(button)
{
  if($(button))
  {
    var button = $(button).getFirst();
    button.src = button.src.replace(/-n./, '-h.');
    ddmenuitem_btn = button;
  }
  
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

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