// Copyright 2006-2007 javascript-array.com

 

var timeout        = 500;
var closetimer    = 0;
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';
}

// 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;