// Copyright 2006-2007 javascript-array.com
var timeout    = 250;
var closetimer    = 0;
var ddmenuitem    = 0;
// close layer when click-out
document.onclick = mclose; 
var allHTMLTags = new Array();

// 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);
    if(ddmenuitem != null)
    ddmenuitem.style.visibility = 'visible';
}
// close showed layer
function mclose()
{
    if(closetimer){
        if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
    }
}
// go close timer
function mclosetime()
{
    closetimer = window.setTimeout(mclose, timeout);
}
// cancel close timer
function mcancelclosetime()
{
    window.clearTimeout(closetimer);
    closetimer = false;
}