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

function jsmenu_open() {
  jsmenu_canceltimer();
  jsmenu_close();
  ddmenuitem = $(this).find('ul').css('visibility', 'visible');
}

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

function jsmenu_timer()
{ closetimer = window.setTimeout(jsmenu_close, timeout); }

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

$(document).ready(function() {
  $('#jsmenu > li').bind('mouseover', jsmenu_open)
  $('#jsmenu > li').bind('mouseout', jsmenu_timer)
});

document.onclick = jsmenu_close;