js判断是否手机端，相对域名跳转到对应的m.手机站

js判断是否手机端，相对域名跳转到对应的m.手机站

<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://m."); //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://m.");
    } else { // 包含"http://www."
        var thisURL = curURL.replace(/^http:\/\/www\./, "http://m.");
    }
  }
  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;
    }
    document.write('<meta name="mobile-agent" content="format=html5;url=' + thisURL + '" />');
  }
})(window);
</script>