1、HTML 和样式部分

<style type="text/css">html{color:#666;background:#FFF;}body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,form,i,fieldset,legend,input,textarea,p,blockquote,th,td{margin:0;padding:0;}body{font:12px/1.3 arial,helvetica,clean,sans-serif,\5b8b\4f53;}h1,h2,h3,h4,h5,h6{font-size:100%;font-weight:normal}table{border-collapse:collapse;border-spacing:0;}img{border:none;}a{text-decoration:none; color:#666;}ul,li{list-style-type:none;}.nav-con{width: 1210px;margin: 0 auto;height: 44px;position: relative;}.nav-con-left{float: left; position: relative; width: 210px;height: 44px;z-index: 10;background: #B1191A;overflow: visible;}.nav-con-lefttext a{display: block;width: 190px;height: 44px;padding: 0 10px;color: white;font: 400 15px/44px "microsoft yahei";}.nav-variety{height: 94px;background: #c81623;}.thing-variety li{border-left: 1px solid #b61d1d;position: relative;z-index: 10;height: 31px;color: white;}.thing-variety .thname{height: 31px;}.thing-variety .thname h4{position: absolute;z-index: 11;height: 31px;line-height: 30px;font-size: 14px;font-weight: 400;padding: 0 10px;}.thing-variety .thname h4 a{color: white;}.thing-variety .thname span{position: absolute;right: 14px;top: 9px;width: 4px;height: 14px;  font: 400 9px/14px consolas;z-index: 1;}.thing-variety .showLi{background: #F7F7F7;}#things .showA{color: #b61d1d;}#things .showSpan{display: none;}/*****************商品分类*****************/.dropdown{width: 999px;position: absolute;left: 209px;top: 43px;background: #F7F7F7;border: 1px solid #b61d1d;overflow: hidden;}.item-brands{float: right;display: inline;width: 168px;margin: 19px 20px 10px 0;}.item-brands a{float: left;display: inline;margin: 1px 0 0 1px;}.item-brands img,.item-promotions img{border: 0;vertical-align: top;}.item-promotions{float: right;display: inline;width: 168px;margin-right: 20px;}.item-promotions a{display: block;margin-bottom: 1px;}.item-channels{width: 790px;float: left;display: inline;height: 24px;padding: 20px 0 0 20px;background: #F7F7F7;overflow: hidden;}.item-channels .channels a{float: left;display: inline-block;padding: 0 0 0 8px;margin-right: 10px;line-height: 24px;background: #7c7171;color: white;font-size: 12px;}.item-channels .channels a span{display: inline-block;margin-left: 8px;width: 23px;height: 24px;font: 400 9px/24px consolas;background: #5c5252;text-align: center; }.item-channels .channels a:hover{background:  #c81623;}.item-channels .channels a:hover span{background:#b61d1d; }.subitems{width: 790px;float: left;padding: 6px 0 1006px 20px;margin-bottom: -1000px;background: #F7F7F7;min-height: 409px;}.subitems dl{width: 100%;line-height: 2em;overflow: hidden;font-size: 12px;}.subitems dl dt{position: relative;float: left;width: 54px;padding: 8px 30px 0 0;text-align: right;font-weight: 700;font-size: 12px;}.subitems dl dt span{position: absolute;top: 13px;right: 18px;width: 4px;height: 14px;font: 400 9px/14px consolas;}.subitems dl dd{border-top: 1px solid #eee;width: 620px;padding: 6px 0;overflow: hidden;}.subitems dl dd a{float: left; padding: 0 8px;margin: 4px 0;line-height: 16px;height: 16px;border-left: 1px solid #e0e0e0;}.subitems .sub1 dd{border-top: none;}.subitems dl dt a:hover{color: #b61d1d;}.subitems dl dd a:hover{ color: #b61d1d;}.hiden{display: none;}</style>
<div class="nav"><div class="nav-con"><div class="nav-con-left"><div class="nav-con-lefttext"><a href="#">全部商品分类</a></div><div class="nav-variety" id="things"><ul class="thing-variety" id="variety"><li class="tab-item"><div class="thname"><h4><a href="#">图书、音像、电子书</a></h4><span>&gt;</span></div></li><li class="tab-item"><div class="thname"><h4><a href="#">彩票、旅行、充值、票务</a></h4><span>&gt;</span></div></li><li class="tab-item"><div class="thname"><h4><a href="#">理财、众筹、白条、保险</a></h4><span>&gt;</span></div></li></ul><div class="dropdown hiden"><div class="fmaint clear hiden"><div class="item-brands"><a href="#"><img src="img/ib1.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib2.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib3.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib4.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib5.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib6.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib7.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib8.jpg" alt="" width="83" height="35"/></a></div><div class="item-channels"><div class="channels"><a href="#">图书频道 <span>&gt;</span></a><a href="#">音响 <span>&gt;</span></a><a href="#">电子书 <span>&gt;</span></a><a href="#">图书榜 <span>&gt;</span></a><a href="#">音乐榜 <span>&gt;</span></a><a href="#">文娱众筹馆 <span>&gt;</span></a></div></div><div class="subitems"><dl class="sub1"><dt><a href="#">众筹<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub2"><dt><a href="#">众筹<span>&gt;</span></a></dt><dd><a href="#" target="_blank">智能硬件</a><a href="#" target="_blank">流行文化</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">公益</a><a href=#" target="_blank">其他权益众筹</a></dd></dl><dl class="sub3"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub4"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub5"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub6"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub7"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub8"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub9"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub10"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub11"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl></div><div class="item-promotions"><a href="#"><img src="img/ib9.jpg" alt="" width="168" height="134"/></a><a href="#"><img src="img/ib10.jpg" alt="" width="168" height="134"/></a></div></div><div class="fmaint clear hiden"><div class="item-brands"><a href="#"><img src="img/ib1.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib2.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib3.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib4.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib5.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib6.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib7.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib8.jpg" alt="" width="83" height="35"/></a></div><div class="item-channels"><div class="channels"><a href="#">充值缴费 <span>&gt;</span></a><a href="#">京东彩票 <span>&gt;</span></a><a href="#">培训教育 <span>&gt;</span></a><a href="#">优选机票 <span>&gt;</span></a><a href="#">火车票 <span>&gt;</span></a></div></div><div class="subitems"><dl class="sub1"><dt><a href="#">众筹<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub2"><dt><a href="#">众筹<span>&gt;</span></a></dt><dd><a href="#" target="_blank">智能硬件</a><a href="#" target="_blank">流行文化</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">公益</a><a href=#" target="_blank">其他权益众筹</a></dd></dl><dl class="sub3"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub4"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub5"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub6"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl></div><div class="item-promotions"><a href="#"><img src="img/ib9.jpg" alt="" width="168" height="134"/></a><a href="#"><img src="img/ib10.jpg" alt="" width="168" height="134"/></a></div></div><div class="fmaint clear hiden"><div class="item-brands"><a href="#"><img src="img/ib1.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib2.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib3.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib4.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib5.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib6.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib7.jpg" alt="" width="83" height="35"/></a><a href="#"><img src="img/ib8.jpg" alt="" width="83" height="35"/></a></div><div class="item-channels"><div class="channels"><a href="#">金融首页 <span>&gt;</span></a><a href="#">尖er货 <span>&gt;</span></a><a href="#">奇趣日报 <span>&gt;</span></a><a href="#">大牌免息 <span>&gt;</span></a><a href="#">财发现 <span>&gt;</span></a></div></div><div class="subitems"><dl class="sub1"><dt><a href="#">众筹<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub2"><dt><a href="#">众筹<span>&gt;</span></a></dt><dd><a href="#" target="_blank">智能硬件</a><a href="#" target="_blank">流行文化</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">公益</a><a href=#" target="_blank">其他权益众筹</a></dd></dl><dl class="sub3"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub4"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub5"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl><dl class="sub6"><dt><a href="#">理财<span>&gt;</span></a></dt><dd><a href="#" target="_blank">京东小金库</a><a href="#" target="_blank">票据理财</a><a href="#" target="_blank">基金理财</a><a href="#" target="_blank">定期理财</a><a href=#" target="_blank">固收理财</a><a href="#" target="_blank">妈妈理财</a></dd></dl></div><div class="item-promotions"><a href="#"><img src="img/ib9.jpg" alt="" width="168" height="134"/></a><a href="#"><img src="img/ib10.jpg" alt="" width="168" height="134"/></a></div></div></div></div></div></div></div>
</div>

HTML 用的图片没贴,不影响效果

2、jQuery 部分

$(function(){var $tabItem = $('#things .tab-item');//获得导航条部分var $fmaint = $('#things .fmaint');//获得内容部分var $at = $('#variety a');var $spant = $('#variety span');var $dropdown = $('.dropdown');$tabItem.each(function (index) {//用each方法给每个导航条添加鼠标移入移除事件$(this).mouseover(function () {$dropdown.removeClass('hiden');$(this).addClass('showLi');$fmaint.eq(index).removeClass('hiden').siblings().addClass('hiden');$at.eq(index).addClass('showA');$spant.eq(index).addClass('showSpan');}).mouseout(function () {$dropdown.addClass('hiden');$(this).removeClass('showLi');$fmaint.eq(index).addClass('hiden');$at.eq(index).removeClass('showA');$spant.eq(index).removeClass('showSpan');});});$fmaint.each(function (index) {//用each方法给每个内容添加鼠标移入移除事件$(this).mouseover(function () {$dropdown.removeClass('hiden');$tabItem.eq(index).addClass('showLi');$fmaint.eq(index).removeClass('hiden').siblings().addClass('hiden');$at.eq(index).addClass('showA');$spant.eq(index).addClass('showSpan');}).mouseout(function () {$dropdown.addClass('hiden');$at.eq(index).removeClass('showA');$spant.eq(index).removeClass('showSpan');$tabItem.eq(index).removeClass('showLi');$fmaint.eq(index).addClass('hiden');});});
})

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