var timeout = 100;
var closetimer = 0;
var ddmenuitem = 0;

function jsddm_open() {
    jsddm_canceltimer();
    jsddm_close();
    ddmenuitem = $("#flyout_content").css('visibility', 'visible');
    return false;/* cancel click event i.e. prevent event bubble up */
}

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() 
{
    $('#flyout_listitem').hover(jsddm_open, jsddm_timer);//hover does not allow mouseout of child elements to trigger callback function
    $('#content_anchor').click(jsddm_open);//click on 'See all shops' link also opens drop-down
});

document.onclick = jsddm_close;