"

From 2011.igem.org

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

function jsddm_open() {

   jsddm_canceltimer();
   jsddm_close();
   ddmenuitem = $(this).find('ul').eq(0).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;