c# - Update using ajax in asp.net mvc -

hi can tell me problem please, , how fix it.

i'm trying update part of page using ajax, i'm using basic code comes new mvc project.

the logon page has this:

 <span id="error"/> @using (ajax.beginform("logon", "account", new ajaxoptions { updatetargetid="error"})) {     <div>         <fieldset>             <legend>account information</legend>              <div class="editor-label">                 @html.labelfor(m => m.username)             </div>             <div class="editor-field">                 @html.textboxfor(m => m.username)                 @html.validationmessagefor(m => m.username)             </div>              <div class="editor-label">                 @html.labelfor(m => m.password)             </div>             <div class="editor-field">                 @html.passwordfor(m => m.password)                 @html.validationmessagefor(m => m.password)             </div>              <div class="editor-label">                 @html.checkboxfor(m => m.rememberme)                 @html.labelfor(m => m.rememberme)             </div>              <p>                     <input type="submit" value="log on" />             </p>         </fieldset>     </div> } 

and controller so:

        [httppost]         public string logon(logonmodel model, string returnurl)         {              if (modelstate.isvalid)             {                 if (membershipservice.validateuser(model.username, model.password))                 {                     formsservice.signin(model.username, model.rememberme);                     if (url.islocalurl(returnurl))                     {                          redirect(returnurl);                     }                     else                     {                          redirecttoaction("index", "home");                     }                 }                 else                 {                     modelstate.addmodelerror("", "the user name or password provided incorrect.");                 }             }              return "the user name or password provided incorrect.";         } 

basically have done embeded login form modal popup. if entered user credentials fail want error displayed inside modal popup, not go off page.

the above code creating blank page text "the user name or password provided incorrect."...i need displayed in modal dialog (jquery).

well, obvious question is, have scripts added page you're trying in? second, if you're posting https (you are, right?), scripts have https or you'll security error.