该代码可以简单的显示当前所访问的网页的最后更新时间
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>分享JavaScript-sharejs.com</title>
</head>
<body>
<div align="center">
<center>
<table border="0" width="179" height="87" cellspacing="0" cellpadding="0" bgcolor="#336699">
<tr>
<td width="179" height="87" style="cursor:hand" onclick=alert("网页最后更新时间\n"+document.lastModified)>
<p align="center"><font size="2" face="Tahoma" color="#FFFFFF">
网页最后更新时间：<br>
<script>document.write(document.lastModified)</script></font></p>
</td>
</tr>
</table>
</center>
</div>
<br><br>
<div align="center">
获取更多JavaScript代码，请登录JavaScript分享网 <a href="http://www.sharejs.com">http://www.sharejs.com</a>
</div>
</body>
</html>
