纯CSS打造的DIV弹出层效果
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>纯CSS打造的DIV弹出层效果</title>
</head>
<style type="text/css">
.f_l {float:left;}
.f_r {float:right;}
.city {height:60px;padding-left:10px;text-align:center;}
.city_now {width:60px;padding-top:20px;color:#595756;font-size:16px;letter-spacing:3px;font-weight:bold;}
.city_box {text-align:center;}
.city_box span {vertical-align:bottom;}
.city_nav {text-align:center;height:18px;line-height:18px;color:#333;cursor:pointer;overflow:hidden;display:inline-block;}
.city_hover {color:#f25000;height:18px;line-height:18px;overflow:hidden;}
.city_link {background:#FFFFFF;border:#f25000 2px solid;width:305px;display:none;z-index:9999;}
.city_hovers {display:block;position:absolute;}
.city_links {width:60px;margin-right:1px;height:30px;line-height:30px;font-size:13px;text-align:center;background:#f6f6f6;vertical-align:top;margin-bottom:1px;display:inline-block;}
.city_show {background:#ccc;height:18px;line-height:18px;padding:5px;cursor:pointer;}
</style>
<body>
<div class="city f_l">
<div class="city_now">北京</div>
<div class="city_swich">
<span class="city_nav" id="city_nav" onclick="this.className='city_nav city_hover';document.getElementById('city_link').className='city_link city_hovers'">[切换城市]</span></div><!-- /vs/ -->
<div id="city_link" class="city_link">
<div class="city_show"><span class="f_red f_r" href="javascript:;" title="关闭窗口" onclick="document.getElementById('city_nav').className='city_nav';document.getElementById('city_link').className='city_link';return !1;">[关闭]</span><span class="f_l f_red"><a href="{$EXT[wap_url]}" target="_blank">欢迎使用！</a></span></div>
<a class="city_links"
href="" onclick="M.goExpr('city_eelou_id','0');return false;">全国</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','1');return false;">北京</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','2');return false;">上海</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','3');return false;">深圳</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','4');return false;">广州</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','5');return false;">西安</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','6');return false;">杭州</a><a class="city_links" href="http://cs.eelou.com" onclick="M.goExpr('city_eelou_id','7');return false;">长沙</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','8');return false;">重庆</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','9');return false;">宁波</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','10');return false;">成都</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','11');return false;">青岛</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','12');return false;">南京</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','13');return false;">昆明</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','14');return false;">武汉</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','15');return false;">天津</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','16');return false;">合肥</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','17');return false;">郑州</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','18');return false;">沈阳</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','19');return false;">大连</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','20');return false;">福州</a><a class="city_links" href="#" onclick="M.goExpr('city_eelou_id','21');return false;">苏州</a><span class="city_links">
</span><span class="city_links"></span><span class="city_links"></span>
</div>
</div>
<br />
</body>
</html>