// Copyright 2006-2007 javascript-array.com

// http://javascript-array.com/scripts/simple_drop_down_menu/

var timeout	= 250;

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;