// Copyright 2006-2007 javascript-array.com

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

// open hidden layer
function mopen(id, parent) 
{
    toplevelitem = parent; 
    
    // 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';
    toplevelitem.setAttribute("className", "hoverParent"); 
}

// close showed layer
function mclose() {

    if (ddmenuitem) ddmenuitem.style.visibility = 'hidden';

    if (toplevelitem) toplevelitem.setAttribute("className", ""); 
}

// 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;