判断终端自动跳转js代码

<script type="text/javascript">    
(function(Switch){    
var switch_pc = window.location.hash;    
var curURL = document.location.href; //当前URL    
var isMobile = curURL.indexOf("http://3g."); //判断当前URL是否是手机站    
var isPc = curURL.indexOf("http://www."); //判断当前URL是否包含"http://www."    
if (isMobile < 0) { //不是手机站    
if (isPc < 0) { //不包含"http://www."    
var thisURL = curURL.replace(/^http:\/\//,"http://3g.");    
} else { // 包含"http://www."    
var thisURL = curURL.replace(/^http:\/\/www\./,"http://3g.");    
}    
}    
if(switch_pc != "#pc"){    
if(/iphone|ipod|ipad|ipad|Android|nokia|blackberry|webos|webos|webmate|bada|lg|ucweb|skyfire|sony|ericsson|mot|samsung|sgh|lg|philips|panasonic|alcatel|lenovo|cldc|midp|wap|mobile/i.test(navigator.userAgent.toLowerCase())){    
Switch.location.href = thisURL ;    
}[xss_clean]('<meta name="mobile-agent" content="format=html5;url='+thisURL+'" />');    
}    
})(window);    
</script>