JavaScript, AJAX authentication

<script type= "Text/javascript" >

function username () {

$ (' #msg1 '). Remove ();

var username = $ ("#Username"). Val ();

var reg = new RegExp ("^ ([A-Z-A-Z u4e00-u9fa5]{4,16})");

if (username = = NULL | | username = = "") {

$ (' #Username '). After ("<b id= ' MSG1 ' >" + "username cannot be empty! "+" </b> ");

return false;

}

else if (!reg.exec (username)) {

$ (' #Username '). After ("<b id= ' MSG1 ' >" + "username can only be used in Chinese, English, numerals, underscores, 4-16 characters! "+" </b> ");

return false;

}

else {

return true;

}

}

function password () {

$ (' #msg1 '). Remove ();

var password = $ ("#Password"). Val ();

if (password = = NULL | | password = = "") {

$ (' #Password '). After ("<b id= ' MSG1 ' >" + "password cannot be empty! "+" </b> ");

return false;

}

else {

return true;

}

}

function ConfirmPassword () {

$ (' #msg1 '). Remove ();

var password = $ ("#Password"). Val ();

var Comfirmpassword = $ ("#ConfrimPassword"). Val ();

if (Comfirmpassword = = NULL | | comfirmpassword = = "") {

$ (' #ConfrimPassword '). After ("<b id= ' MSG1 ' >" + "Confirm password cannot be empty! "+" </b> ");

return false;

}

else if (comfirmpassword! = password) {

$ (' #ConfrimPassword '). After ("<b id= ' MSG1 ' >" + "two times password input inconsistent! "+" </b> ");

return false;

}

else {

return true;

}

}

function telephone () {

$ (' #msg1 '). Remove ();

var telephone = $ ("#Telephone"). Val ();

var reg = new RegExp ("^ (13[0-9]{9}) | ( 14[0-9]) | (18[0-9]) | (15[0-9][0-9]{8}) $ ");

if (telephone = = NULL | | telephone = = "") {

$ (' #Telephone '). After ("<b id= ' MSG1 ' >" + "phone number cannot be empty! "+" </b> ");

return false;

}

else if (!reg.exec (telephone)) {

$ (' #Telephone '). After ("<b id= ' MSG1 ' >" + "phone number is not formatted correctly! "+" </b> ");

return false;

}

else {

return true;

}

}

function email () {

$ (' #msg1 '). Remove ();

var email = $ ("#Email"). Val ();

var reg = new RegExp ("^ ([a-za-z0-9_-]) [email protected] ([a-za-z0-9_-]) + ((\.[ a-za-z0-9_-]{2,3}) ($ ");

if (email = = NULL | | email = = "") {

$ (' #Email '). After ("<b id= ' MSG1 ' >" + "Mailbox cannot be empty! "+" </b> ");

return false;

}

else if (!reg.exec (email)) {

$ (' #Email '). After ("<b id= ' MSG1 ' >" + "Mailbox format is incorrect! "+" </b> ");

return false;

}

else {

return true;

}

}

var returnvalue = false;

function Registeryanzheng () {

var username = $ ("#Username"). Val ();

var Quanxian = $ ("#DropDownListPermission"). Val ();

var a = "User name or permission exists";

$.ajax ({

Type: "POST",

URL: "Register.aspx?action=ajax",

Data: "Z_username=" + username + "&&z_permission=" + Quanxian,

Success:function (msg) {

$ (' #msg1 '). Remove ();

$ ("#Submit"). attr ("disabled", false);

if (Msg.indexof (a) >-1) {

$ (' #DropDownListPermission '). After ("<b id= ' MSG1 ' >" + msg + "</b>");

Determine if the button is available

$ ("#Submit"). attr ("Disabled", true);

ReturnValue = false;

}

else {

$ ("#Submit"). attr ("disabled", false);

ReturnValue = true;

}

}

});

}

function Yanzheng () {

if (!username ()) {

return false;

}

if (!password ()) {

return false;

}

if (!confirmpassword ()) {

return false;

}

if (!telephone ()) {

return false;

}

if (!email ()) {

return false;

}

if (!registeryanzheng ()) {

Registeryanzheng ();

Return returnvalue;

}

else {

return true;

}

}

</script>

Background:

if (! String.IsNullOrEmpty (request["Action"]) && request["action"] = = "Ajax")

{

String username = request["Z_username"];

string permission = request["Z_permission"];

SqlConnection conn = new SqlConnection (URL);

Conn. Open ();

Try

{

SqlCommand cmd = new SqlCommand ();

DataTable dt = new DataTable ();

Cmd.commandtext = "SELECT * from zmt_user where z_username = '" + Username + "'"

+ "and z_permission = '" + permission + "'";

Cmd. Connection = conn;

SqlDataAdapter SDA = new SqlDataAdapter (cmd);

Sda. Fill (DT);

if (dt. Rows.Count > 0)

{

Response.Write ("User name or permission exists");

System.Threading.Thread.Sleep (2000);

}

else {

Response.Write ("does not exist");

}

}

catch (Exception ex)

{

Console.WriteLine ("Error");

}

Finally

{

Response.End ();

Conn. Close ();

}

Response.End ();

}

Note the receipt of the return value

JavaScript, AJAX authentication