鼠标悬浮在超链接上弹出提示框：
大家知道超链接有一个title属性，当鼠标放在链接的时候，可以出现一个提示框效果，不过自带的效果虽然廉价但往往并不物美，所以需要自定义一个，下面是一个纯CSS实现的这样的效果，和大家分享一下。
代码实例如下:
<!DOCTYPE html><html><head><meta charset=" utf-8"><meta name="author" content="http://www.softwhy.com/" /><title>鼠标悬浮在超链接上弹出提示框-蚂蚁部落</title><style type="text/css">body{ font-size:12px;}.tip{ color:red; text-decoration:none; position:relative;}.tip span{ display:none;}.tip:hover{ cursor:hand;}.tip:hover .popbox{ display:block; position:absolute; top:15px; left:-30px; width:100px; background-color:#424242; color:#fff; padding:10px;}</style></head><body>蚂蚁部落欢迎您，点击<a href="#" class="tip">链接<span class="popbox">蚂蚁部落提供基础的实例教程</span></a></body></html> 实现原理非常的简单，这里主要是使用了绝对定位，只要高明吧了这个原理，那么就没有什么难度了。
CSS绝对定位可以参阅CSS的绝对定位一章节。
原文地址是:http://www.softwhy.com/forum.php?mod=viewthread&tid=9270
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