// Copyright 2006-2007 javascript-array.com

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

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

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

    ddmenuitem = document.getElementById(id);
    opentimer = window.setTimeout(mshow, (timeout));
}

function mshow() {

    // get new layer and show it
    //ddmenuitem = document.getElementById(id);
    if (ddmenuitem) {

        ddmenuitem.style.visibility = 'visible';
    }
    window.clearTimeout(opentimer);
    opentimer = null;
}

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

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

// cancel close timer
function mcancelclosetime() {
    if (closetimer) {
        window.clearTimeout(closetimer);
        closetimer = null;
    }

}

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