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);

  var pathname=window.location.pathname;
  $('#nav_main li:has(a[href='+pathname+'])').addClass('active');
});

document.onclick = jsddm_close;