请教如何用javascript实现查看网页源码??
<html>
<head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>查看源代码</title></head>
<body><input TYPE="button" NAME="view" VALUE="查看源代码" OnClick="window.location='view-source:' +window.location.href" ></body>
</html>