jQuery有滑动动感的导航菜单

一级导航菜单html代码

<div class="meun">
    <div class="meun_bg"></div>
    <ul>
        <li><a href="http://www.sucaihuo.com/"><span>首页</span></a></li>
        <li><a href="http://www.sucaihuo.com/js"><span>jquery 特效</span></a></li>
        <li><a href="http://www.sucaihuo.com/"><span>javascript特效</span></a></li>
    </ul>
</div>

$(".meun").lavaLamp({
    fx: "backout",
    speed: 700,
    click: function(event, menuItem) {
        return true;
    }
});