如:\x64 对应 16进制 0x64 转10进制就是 0x64.toString(10) == 100, 查对应的ascii码表得到 ‘d'
<div id=code style='display:none'>这里放你的那些代码</div>
<script>
s = document.getElementById('code').innerHTML;
s = s.replace(/\\x../g, function(a) {return eval('"'+a+'"')})
.replace(/\\u(....)/g, function(a,b){return String.fromCharCode(eval('0x'+b))})
document.write(s)
</script>