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

function jsddm_open()
{  jsddm_canceltimer();
   jsddm_close();

   ddmenuitem = $(this).find('ul').css('visibility', 'visible');
      $(ddmenuitem).parent().addClass("active");

   }

function jsddm_close()
{  if(ddmenuitem) ddmenuitem.css('visibility', 'hidden');
	$(ddmenuitem).parent().removeClass('active');
}

function jsddm_timer()
{  closetimer = window.setTimeout(jsddm_close, timeout);}

function jsddm_canceltimer()
{  if(closetimer)
   {  window.clearTimeout(closetimer);
      closetimer = null;}}

$(document).ready(function()
{  $('#navigation ul > li').bind('mouseover', jsddm_open)
   $('#navigation ul > li > a').bind('mouseout',  jsddm_timer)});

document.onclick = jsddm_close;