// 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
        mclose();

        // get new layer and show it
        ddmenuitem = document.getElementById(id);
        //if (ddmenuitem.parentNode.offsetHeight)
  //  ddmenuitem.style.top = (ddmenuitem.parentNode.offsetHeight - 5) + 'px';
        ddmenuitem.style.display = 'block';
  }

// close showed layer
function mclose() {
        if (ddmenuitem) ddmenuitem.style.display = 'none';
  }

// 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;