var timeout    = 700;
var closetimer = 0;
var ddmenuitem = 0;

function popmenu_open()
{  popmenu_canceltimer();
   popmenu_close();
   ddmenuitem = jQuery(this).find('ul').css('visibility', 'visible');}

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

function popmenu_timer()
{  closetimer = window.setTimeout(popmenu_close, timeout);}

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

jQuery(document).ready(function()
{  jQuery('#popmenu > li').bind('mouseover', popmenu_open)
   jQuery('#popmenu > li').bind('mouseout',  popmenu_timer)});

document.onclick = popmenu_close;