网页设置关于visibility的用法
<html> <head> <title>WORK4</title> <style type="text/css"> a{display:block; width:100px; text-decoration:none; text-align:center;} #top{float:left; width:100px;} #footer{float:left; width:100px;} div p{background:#DEB887; visibility:hidden; width:300px; height:300px} a:hover{background:#ccc;} .a1:hover #topa{visibility:visible;} </style> </head> <body> <div> <div id="top"><a href="#" class="a1">baidu</a> <p id="topa">sajkdhsjakh</p> </div> <div id="footer"><a href="#" class="b1">come</a> <p id="footera">sajdkhsajkd</p> </div> </div> </body><html>求大神看看代码哪里错了，怎么就是实现不了那个区块隐藏后随鼠标移到标签上显示出来啊！急，在线等！
