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Jquery Bind Click Not Working
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() {
   $('#mainnavigation > li').bind('mouseover', jsddm_open)
   $('#mainnavigation > li').bind('mouseout',  jsddm_timer)});

document.onclick = jsddm_close;

$('#mainnavigation > li').bind('click', jsddm_open)

$('#mainnavigation > li').click(function() {
        jsddm_open();
 });