js怎么点击导航菜单

 <li><a href="{:U('Index/index')}" class="current">首页</a></li>
 <li><a href="{:U('Goods/goodsList')}">叉车租赁</a>
   <ul>
        <li><a href="{:U('Goods/goodsList')}">年月租</a></li>
        <li><a href="{:U('Goods/goodsTemp')}">临时租</a></li>
   </ul>
 </li>
 <li><a href="{:U('Special/index')}">好运商城</a>
    <ul>
        <li><a href="{:U('Special/index')}">特价车</a></li>
        <!-- <li><a href="{:U('MallShop/Industry')}">工业品</a></li> -->
    </ul>
 </li>
 <li> <a href="{:U('News/articleList',array('cat_id'=>$art_cat[0]['cat_id']))}">资讯中心</a>
   <ul>
        <foreach item='art_cat' name='art_cat'>
          <li><a href="{:U('News/articleList',array('cat_id'=>$art_cat['cat_id']))}">{$art_cat.cat_name}</a></li>
        </foreach>
        <li><a href="{:U('News/news1')}">租赁问答</a></li>
   </ul>
 </li>
 <li><a href="{:U('service/service')}">服务网络</a></li>
 <li><a href="{:U('service/join')}">加盟合作</a></li>
 <li class="last"><a href="{:U('News/about',array('cat_id'=>$about_cat[0]['cat_id']))}">关于我们</a>
   <ul>
      <foreach item='about_cat' name='about_cat'>
        <li><a href="{:U('News/about',array('cat_id'=>$about_cat['cat_id']))}">{$about_cat.cat_name}</a></li>
      </foreach>
      <li><a href="{:U('News/download')}">下载专区</a></li>
   </ul>
 </li> 

<script src="/Public/hyw/js/jquery1.8.3.min.js"></script>
   <script type="text/javascript">
//获取cookie中保存的导航分类名称
var menu_name_cookie = getcookie('menu_name_cookie');
$('.menuLink>li').each(function(key,val){
    //获取li里的a标签的导航分类名称
    var menu_name_li = $(val).children('a').html();
    if(menu_name_li == menu_name_cookie){
        //清除默认选中
        $('.menuLink>li>a').attr({'class':''});
        //选中符合条件的li
        $(val).children('a').attr({'class':'current'});
        return false;
    }
})

//点击导航li时用cookie存储所点击的导航分类名称
$('.menuLink>li').click(function(){
    var menu_name_cookie = $(this).children('a').html();
    document.cookie="menu_name_cookie="+menu_name_cookie+";path=/";
})

//获取指定名称的cookie的值
function getcookie(objname){
    var arrstr = document.cookie.split("; ");
    for(var i = 0;i < arrstr.length;i ++){
        var temp = arrstr[i].split("=");
        if(temp[0] == objname) return unescape(temp[1]);
    }
}
</script>