<!doctype html>
<html dir="ltr" lang="zh-CN">
<head>
<meta charset="utf-8"/>
<title>javascript提速技术 by 司徒正美</title>
<script type="text/javascript">
var __chrome = navigator.userAgent.indexOf("Chrome") !== -1;
var __firefox = !!window.Components
if( !__chrome & !__firefox ){
var code = [],ri = 0,prop,str = "var "
for(var a in window)
code[ri++] = a;
for (var i = 0 ,n = code.length;i<n;i++){
var prop = code[i]
window['_'+prop] = window[prop];
str += prop+'=_'+prop+","
}
str = str.slice(0,-1);
eval(str)
}
var date = new Date;
for (var i = 0; i < 100000; i++)
document;
alert(new Date - date);
</script>
</head>
<body>
!!!!!!
</body>
</html>