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

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

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

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

}

function mopentime()
{
	opentimer = setTimeout(mopen, timeout);
}
// close showed layer
function mclose()
{
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

// 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; 
// -->

var myWindow;

function openCenteredWindow(url) {
    var width = 980;
    var height = 800;
    var left = (screen.width - width) / 2;
	var top =  (screen.height - height) / 2;
  
    var windowFeatures = "width=" + width + ",height=" + height + ",status,scrollbars=yes,resizable,left=" + left + ",top=" + top + "screenX=" + left + ",screenY=" + top;
    myWindow = window.open(url, "subWind", windowFeatures);
}