var timeout	= 200;
var closetimer	= 0;
var ddmenuitem	= 0;
var ddmenusender = 0;

// open hidden layer
function mopen(id, sender)
{	
	// cancel close timer
	mcancelclosetime();
	hidehover();
	
	// close old layer
	if(ddmenuitem)
	{
		ddmenuitem.style.visibility = 'hidden';
	}

	// get new layer and show it
	
	ddmenusender = sender;
	ddmenusender.setAttribute("className", "main_menu_item2");
	ddmenusender.setAttribute("class", "main_menu_item2");
	
	ddmenuitem = document.getElementById(id);
	if (!ddmenuitem)
	{
		return;
	}
	ddmenuitem.style.visibility = 'visible';

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

function hidehover()
{
	if (ddmenusender)
	{
		ddmenusender.setAttribute("className", "main_menu_item");
		ddmenusender.setAttribute("class", "main_menu_item");
	}
}

// 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;