function Login() {
            var UUserNames = $.trim($("#UUserName").val());
            var UPassWords = $.trim($("#UPassWord").val());
            if (UUserNames == "") {
                alert("没有用户名是不能登录的！");
                $("#UUserName").focus();
                return false;
            }
            else if (UPassWords == "") {
                alert("没有密码是不能登录的！");
                $("#UPassWord").focus();
                return false;
            }
            else {
                $.post("/Login/LoginUser/", { UUserName: UUserNames, UPassWord: UPassWords }, function (msg) {
                    if (msg != "welcome_oa") {
                        alert(msg);
                    }
                    else {
                        window.location.href = "/Home/First/";
                    }
                });
            }
        }