pbootcms电脑端自动判断跳转到手机端

(function(){
    try {
        var urlhash = window.location.hash;
        if (!urlhash.match("fromapp")) {
            if ((navigator.userAgent.match(/(iPhone|iPod|Android|ios|iPad)/i))) {
           window.location = "http://4g.yy.com";
            }
        }
    } 
        catch (err) {
    }
})();