下拉菜单

下拉导航

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        <div class="box" id="navbox" style="height:0px;opacity:0;overflow:hidden;">
            <div class="cont" style="display:none;">
                <ul class="sublist clearfix">
                    <li>
                        <h3 class="mcate-item-hd"><span>服饰内衣</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">女装</a>
                            <a href="#">男装</a>
                            <a href="#">内衣</a>
                            <a href="#">家居服</a>
                            <a href="#">配件</a>
                            <a href="#">羽绒</a>
                            <a href="#">呢大衣</a>
                            <a href="#">毛衣</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>鞋 箱包</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">女鞋</a>
                            <a href="#">男鞋</a>
                            <a href="#">箱包</a>
                            <a href="#">女包</a>
                            <a href="#">男包</a>
                            <a href="#">旅行箱</a>
                            <a href="#">钱包 </a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>珠宝、手表</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">饰品</a>
                            <a href="#">项链</a>
                            <a href="#">珠宝</a>
                            <a href="#">钻石</a>
                            <a href="#">手表</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>化妆品</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">护肤</a>
                            <a href="#">彩妆</a>
                            <a href="#">香水</a>
                            <a href="#">男士</a>
                            <a href="#">精油</a>
                            <a href="#">假发</a>
                            <a href="#">美体</a>
                            <a href="#">试用服务</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>运动 户外</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">运动鞋</a>
                            <a href="#">运动服</a>
                            <a href="#">运动用品</a>
                            <a href="#">户外</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>手机 数码</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">手机</a>
                            <a href="#">笔记本</a>
                            <a href="#">相机</a>
                            <a href="#">平板电脑</a>
                            <a href="#">配件</a>
                            <a href="#">电脑硬件</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>家用电器</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">大家电</a>
                            <a href="#">影音电器</a>
                            <a href="#">生活电器</a>
                            <a href="#">厨房电器</a>
                            <a href="#">健康护理</a>
                            <a href="#">剃须刀</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>家具 建材</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">家具</a>
                            <a href="#">卫浴</a>
                            <a href="#">地板</a>
                            <a href="#">灯具</a>
                            <a href="#">五金</a>
                            <a href="#">开关</a>
                            <a href="#">装修设计</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>家纺 居家</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">家纺</a>
                            <a href="#">磨毛套件</a>
                            <a href="#">羽绒被</a>
                            <a href="#">枕头</a>
                            <a href="#">软饰</a>
                            <a href="#">居家</a>
                            <a href="#">厨房</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>食品</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">零食</a>
                            <a href="#">进口</a>
                            <a href="#">茶叶</a>
                            <a href="#">冲饮</a>
                            <a href="#">酒水</a>
                            <a href="#">粮油</a>
                            <a href="#">干货</a>
                            <a href="#">生鲜</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>医药保健</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">保健</a>
                            <a href="#">滋补</a>
                            <a href="#">蛋白粉</a>
                            <a href="#">阿胶</a>
                            <a href="#">药品</a>
                            <a href="#">血压仪</a>
                            <a href="#">计生</a>
                            <a href="#">体检</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>母婴用品</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">玩具</a>
                            <a href="#">宝宝食品</a>
                            <a href="#">用品</a>
                            <a href="#">童装</a>
                            <a href="#">孕装</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>汽车 配件</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">新车</a>
                            <a href="#">座垫</a>
                            <a href="#">脚垫</a>
                            <a href="#">GPS</a>
                            <a href="#">车衣</a>
                            <a href="#">洗车机</a>
                            <a href="#">水枪</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>文化 玩乐</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">电子凭证</a>
                            <a href="#">图书</a>
                            <a href="#">乐器</a>
                            <a href="#">旅游</a>
                            <a href="#">鲜花</a>
                        </p>
                    </li>
                </ul>
            </div>
            <div class="cont" style="display:none;">
                <ul class="sublist clearfix">
                    <li>
                        <h3 class="mcate-item-hd"><span>服饰内衣</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">女装</a>
                            <a href="#">男装</a>
                            <a href="#">内衣</a>
                            <a href="#">家居服</a>
                            <a href="#">配件</a>
                            <a href="#">羽绒</a>
                            <a href="#">呢大衣</a>
                            <a href="#">毛衣</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>鞋 箱包</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">女鞋</a>
                            <a href="#">男鞋</a>
                            <a href="#">箱包</a>
                            <a href="#">女包</a>
                            <a href="#">男包</a>
                            <a href="#">旅行箱</a>
                            <a href="#">钱包 </a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>珠宝、手表</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">饰品</a>
                            <a href="#">项链</a>
                            <a href="#">珠宝</a>
                            <a href="#">钻石</a>
                            <a href="#">手表</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>化妆品</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">护肤</a>
                            <a href="#">彩妆</a>
                            <a href="#">香水</a>
                            <a href="#">男士</a>
                            <a href="#">精油</a>
                            <a href="#">假发</a>
                            <a href="#">美体</a>
                            <a href="#">试用服务</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>运动 户外</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">运动鞋</a>
                            <a href="#">运动服</a>
                            <a href="#">运动用品</a>
                            <a href="#">户外</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>手机 数码</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">手机</a>
                            <a href="#">笔记本</a>
                            <a href="#">相机</a>
                            <a href="#">平板电脑</a>
                            <a href="#">配件</a>
                            <a href="#">电脑硬件</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>家用电器</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">大家电</a>
                            <a href="#">影音电器</a>
                            <a href="#">生活电器</a>
                            <a href="#">厨房电器</a>
                            <a href="#">健康护理</a>
                            <a href="#">剃须刀</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>家具 建材</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">家具</a>
                            <a href="#">卫浴</a>
                            <a href="#">地板</a>
                            <a href="#">灯具</a>
                            <a href="#">五金</a>
                            <a href="#">开关</a>
                            <a href="#">装修设计</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>家纺 居家</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">家纺</a>
                            <a href="#">磨毛套件</a>
                            <a href="#">羽绒被</a>
                            <a href="#">枕头</a>
                            <a href="#">软饰</a>
                            <a href="#">居家</a>
                            <a href="#">厨房</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>食品</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">零食</a>
                            <a href="#">进口</a>
                            <a href="#">茶叶</a>
                            <a href="#">冲饮</a>
                            <a href="#">酒水</a>
                            <a href="#">粮油</a>
                            <a href="#">干货</a>
                            <a href="#">生鲜</a>
                        </p>
                    </li>
                </ul>
            </div>
            <div class="cont" style="display:none;">
                <ul class="sublist clearfix">
                    <li>
                        <h3 class="mcate-item-hd"><span>服饰内衣</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">女装</a>
                            <a href="#">男装</a>
                            <a href="#">内衣</a>
                            <a href="#">家居服</a>
                            <a href="#">配件</a>
                            <a href="#">羽绒</a>
                            <a href="#">呢大衣</a>
                            <a href="#">毛衣</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>鞋 箱包</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">女鞋</a>
                            <a href="#">男鞋</a>
                            <a href="#">箱包</a>
                            <a href="#">女包</a>
                            <a href="#">男包</a>
                            <a href="#">旅行箱</a>
                            <a href="#">钱包 </a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>珠宝、手表</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">饰品</a>
                            <a href="#">项链</a>
                            <a href="#">珠宝</a>
                            <a href="#">钻石</a>
                            <a href="#">手表</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>化妆品</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">护肤</a>
                            <a href="#">彩妆</a>
                            <a href="#">香水</a>
                            <a href="#">男士</a>
                            <a href="#">精油</a>
                            <a href="#">假发</a>
                            <a href="#">美体</a>
                            <a href="#">试用服务</a>
                        </p>
                    </li>
                    <li>
                        <h3 class="mcate-item-hd"><span>运动 户外</span></h3>
                        <p class="mcate-item-bd">
                            <a href="#">运动鞋</a>
                            <a href="#">运动服</a>
                            <a href="#">运动用品</a>
                            <a href="#">户外</a>
                        </p>
                    </li>
                </ul>
            </div>
            <div class="cont" style="display:none;">3<br />3</div>
            <div class="cont" style="display:none;">4<br />3<br />4</div>
            <div class="cont" style="display:none;">5</div>
            <div class="cont" style="display:none;">6<br />3<br />3</div>
            <div class="cont" style="display:none;">7<br />3<br />3<br />3</div>
        </div>
    </div>
</div>

<script type="text/javascript">
(function(){

    var time = null;
    var list = $("#navlist");
    var box = $("#navbox");
    var lista = list.find("a");
    
    for(var i=0,j=lista.length;i<j;i++){
        if(lista[i].className == "now"){
            var olda = i;
        }
    }
    
    var box_show = function(hei){
        box.stop().animate({
            height:hei,
            opacity:1
        },400);
    }
    
    var box_hide = function(){
        box.stop().animate({
            height:0,
            opacity:0
        },400);
    }
    
    lista.hover(function(){
        lista.removeClass("now");
        $(this).addClass("now");
        clearTimeout(time);
        var index = list.find("a").index($(this));
        box.find(".cont").hide().eq(index).show();
        var _height = box.find(".cont").eq(index).height()+54;
        box_show(_height)
    },function(){
        time = setTimeout(function(){    
            box.find(".cont").hide();
            box_hide();
        },50);
        lista.removeClass("now");
        lista.eq(olda).addClass("now");
    });
    
    box.find(".cont").hover(function(){
        var _index = box.find(".cont").index($(this));
        lista.removeClass("now");
        lista.eq(_index).addClass("now");
        clearTimeout(time);
        $(this).show();
        var _height = $(this).height()+54;
        box_show(_height);
    },function(){
        time = setTimeout(function(){        
            $(this).hide();
            box_hide();
        },50);
        lista.removeClass("now");
        lista.eq(olda).addClass("now");
    });

})();
</script>
<div style="text-align:center;margin:50px 0; font:normal 14px/24px 'MicroSoft YaHei';">
<p>来源:<a href="http://www.daimajiayuan.com/" target="_blank">代码家园</a></p>
</div>
</body>
</html>

css

@charset "utf-8";

*{margin:0;padding:0;list-style-type:none;}
a,img{border:0;text-decoration:none;}
body{ font: 12px/180% Arial, Helvetica, sans-serif, "新宋体"; background-color: #E8E8E8; }
.clearfix:after{content:".";display:block;height:0;clear:both;visibility:hidden}
.clearfix{display:inline-table}
*html .clearfix{height:1%}
.clearfix{display:block}
*+html .clearfix{min-height:1%}
/* nav_menu */
.nav_menu{ height: 42px; background-color: #333333; }
.nav{width:1006px;height:41px;position:relative;margin:0 auto;}
.nav .list li{float:left;}
.nav .list a{float:left;display:block;width:125px;height:42px;text-align:center;font:bold 13px/36px "微软雅黑";color:#fff;}
.nav .list a:hover{color:#FFA304;}
.nav .list a:hover,.nav .list .now{color:#F00;background:#fff;}
.nav .box{position:absolute;left:-5px;top:42px;width:1006px;background:#FFF;overflow:hidden;height:0;filter:alpha(opacity=0);opacity:0;border-bottom:2px solid #074c52;}
.nav .cont{position:relative;padding:25px 0 0px 24px;}
/* sublist */
.sublist li{float:left;width:168px;padding-right:24px;padding-bottom:24px;}
.sublist li h3.mcate-item-hd{font-family:'微软雅黑';padding-left:2px;font-size:14px;height:26px;line-height:26px;border-bottom:1px dashed #666666;}
.sublist li p.mcate-item-bd{padding-left:2px;}
.sublist li p.mcate-item-bd a{height:26px;line-height:26px;margin-right:5px;font-size:12px;color:#666666;text-decoration:none;display:inline-block;}
.sublist li p.mcate-item-bd a:hover{color:#6c5143;text-decoration:underline;}
原文地址:https://www.cnblogs.com/wzzl/p/5139108.html