<script language="javascript">
function clear(){
Source=document.body.firstChild.data;
document.open();
document.close();
document.title="看不到源代碼";
document.body.innerHTML=Source;
}
</script>
</head>
<body οnlοad=clear()></body>
查看方法：在地址欄輸入javascript:alert(document.documentElement.outerHTML);