js如何实现快速搜索？js快速搜索实例（附代码）

<div style="border:1px solid #ccc;margin:20px;padding-bottom:10px;" id="foodList">
            <ul>
                {eq name="list['state']" value='0'}
                    <li>请添加菜品类型</li>
                {else}
                    {eq name="list['count']" value='0'}
                        <li>请添加菜品</li>
                    {else}
                        {volist name="list['data']" id='list'}
                        <li data-p=&#39;{eq name="$list.food_p1" value=".00"}0{/eq}{$list.food_p1}&#39; data-u=&#39;{$list.food_u1}&#39; data-id=&#39;{$list.food_id}&#39;>{$list.food_name}<i>{$list.food_code}</i></li>
                        {/volist}
                    {/eq}
                {/eq}
            </ul>
            <div class="cl"></div>
        </div>

$("#foodCode").keyup(function(){            
$("#foodList ul li").stop().hide().filter(":contains('"+($(this).val())+"')").show();//contains 匹配文本中内容
});