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

function jsddm_open()
{   jsddm_canceltimer();
    jsddm_close();
    ddmenuitem = $(this).find('ul').css('visibility', 'visible');
    ddmenutop = $(this).addClass("active");
    }

function jsddm_close()
{   if(ddmenuitem) { 
        ddmenuitem.css('visibility', 'hidden');
        ddmenutop.removeClass("active");
    }
}

function jsddm_close_click()
{   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()
{   
    
    $('#menu-header-nav > li:lt(3)').addClass('block');
    $('#menu-header-nav > li > ul').append('<li class="last"></li>');
    $('#menu-header-nav > li').bind('mouseover', jsddm_open);
    $('#menu-header-nav > li').bind('mouseout',  jsddm_timer);});

document.onclick = jsddm_close_click;