$(document).bind("ready", function() {

    var $subMenuAtivo = null;
    
    $(".menuLinkChild").click(function ()
    {
        $this = $(this);
        $submenu = $this.next().children(".sub_menu");        
        
        if(($subMenuAtivo && $subMenuAtivo.get(0)) !== $submenu.get(0))
        {
			if ($subMenuAtivo !== null)
	            $subMenuAtivo.slideUp("fast");
				
            $subMenuAtivo = $submenu;
            $subMenuAtivo.slideDown("medium");
        }
        else
        {
            $subMenuAtivo.slideUp("fast");
			$subMenuAtivo = null;
        }     
        
    });
    
});