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

function ddm_open(){
    ddm_canceltimer();
    ddm_close();
    ddmenuitem = $(this).find('ul').eq(0).css('visibility', 'visible');
}

function ddm_close(){
    if (ddmenuitem) 
        ddmenuitem.css('visibility', 'hidden');
}

function ddm_timer(){
    closetimer = window.setTimeout(ddm_close, timeout);
}

function ddm_canceltimer(){
    if (closetimer) {
        window.clearTimeout(closetimer);
        closetimer = null;
    }
}

$(document).ready(function(){
    $('#nav > li').bind('mouseover', ddm_open);
    $('#nav > li').bind('mouseout', ddm_timer);

    $('.cleanOnClick').click(function(e) {
        e.target.value = '';
    });
});

document.onclick = ddm_close;

/*

 http://javascript-array.com/scripts/jquery_simple_drop_down_menu/

 */