JSon value transfer

$ ("# Login"). click (function () {if ($ ('# userid'). val ()! = "" & $ ('# PwdId'). val ()! = "") {$. Ajax ({type: 'post', async: false, url: 'login. aspx/loginYN ', data: "{'username':'" + $ ('# userid '). val () + "', 'Password':'" + $ ('# pwdId '). val () + "'}", contentType: "application/json; charset = UTF-8", dataType: "json", success: function (msg) {if (msg. d = "1") {window. location. href = 'admin/index. aspx ';} else {alert ("the user name or password is incorrect! ") ;}}, Error: function (err) {alert (" Logon Failed! Please try again later or contact the administrator. ") ;}}) ;}Else {alert (" Enter your username or password! ");}});

 

Background:

[WebMethod]    public static string loginYN(string username, string password)    {        tb_admin lg = new tb_admin();        lg._username = username.Trim();        lg._password = FormsAuthentication.HashPasswordForStoringInConfigFile(password.Trim(), "MD5");        return b_login.loginYN(lg);    }