(function($) {
var timeout    = 500;
var closetimer = 0;
var ddmenuitem = 0;

function jsddm_open()
{  
  jsddm_canceltimer();
  jsddm_close();
  ddmenuitem = $(this).find('ul').css('visibility', 'visible');
}

function jsddm_close()
{  
  if(ddmenuitem) ddmenuitem.css('visibility', 'hidden');
}

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

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

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

document.onclick = jsddm_close;
})(jQuery)