判断是否为手机端

function toLive() {
            var ua = navigator.userAgent;
            var ipad = ua.match(/(iPad).*OS\s([\d_]+)/),
                isIphone = !ipad && ua.match(/(iPhone\sOS)\s([\d_]+)/),
                isAndroid = ua.match(/(Android)\s+([\d.]+)/),
                isMobile = isIphone || isAndroid;
            if (isMobile) {
                window.open('http://ihjrm.com/live/mroom.aspx?lcid=7586');
            } else {
                window.open('http://ihjrm.com/live/room2.aspx?lcid=7586');
            }
        }