html网页代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<SCRIPT language=Javascript src="1.js" type=text/javascript></SCRIPT>
</head>
<body>
</body>
</html>
js文件代码：
window.location.href = "http://www.baidu.com";
或者复杂一点，做个变量
var _$ = ["http://www.baidu.com"];
window.location.href = _$[0];