js 正则获得微博 MID

        function Fun_GetMid(url) {
            var re = /http:\/\/(e\.)?weibo.com\/[\d]+?\/[\w]+/i;
            var mc = url.match(re);
            var val = mc[0];
            var index = val.lastIndexOf("/");
            var mid = val.substr(index + 1);
            alert(mid);
        }