// 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;