如果你的网站开启了手机版，并且域名的格式是把www前缀转为成m前缀，那么你只需要复制以下代码到你的网站相应的页面即可。

<script type="text/javascript">
 var mobileAgent = new Array("iphone", "ipod", "ipad", "android", "mobile", "blackberry", "webos", "incognito", "webmate", "bada", "nokia", "lg", "ucweb", "skyfire");
 var browser = navigator.userAgent.toLowerCase();
 var isMobile = false;
 for (var i=0; i<mobileAgent.length; i++){ if (browser.indexOf(mobileAgent[i])!=-1){ isMobile = true;
var titleurl = location.href;
 location.href = titleurl.replace(/http://www/,'http://m');
 break; } }
</script>