<html>
<head>
<style>
a:hover
{
background-color:yellow;
}
</style>
</head>
<body>
<a href="/">ziqiangxuetang.com</a>
<a href="http://www.wikipedia.org">wikipedia.org</a>
<p><b>Note:</b> The :hover selector style links on mouse-over.</p>
</body>
</html>