asp.net mvc using ajax, but the callback won't redirect -

i'm using ajax 2 different partial views in same parent view. ajax request submitted successfully, , onsuccess() function called, page won't redirect. here's code. i've made sure returnurl absolute address. view:

@{ viewbag.title = "log in/register"; }  <hgroup class="title"> <h1>@viewbag.title.</h1> </hgroup>  @section customscripts { <script type ="text/javascript">     function onsuccess(){          var returnurl = @viewbag.returnurl          window.location =  returnurl     } </script> }  <section id="loginform">  @{ if(!websecurity.isauthenticated){     <h2>use creative works account log in.</h2> @html.action("_loginpartial", new {returnurl = viewbag.returnurl })  } } </section> <section id ="registerform"> @{     if(!websecurity.isauthenticated){         <span>don't have account? make one!</span>         @html.action("registerpartial", new { returnurl = viewbag.returnurl })     } } </section> @section scripts { @scripts.render("~/bundles/jqueryval") } 

partialview login:

@{ viewbag.title = "loginpartial"; } @using (ajax.beginform("_loginpartial", new {returnurl = viewbag.returnurl},  new ajaxoptions(){updatetargetid = "loginform",  insertionmode = insertionmode.replace, onsuccess = "onsuccess" })) {           @html.antiforgerytoken()     @html.validationsummary(true)      <fieldset>         <legend>log in form</legend>         <ol>             <li>                 @html.labelfor(m => m.username)                 @html.textboxfor(m => m.username)                 @html.validationmessagefor(m => m.username)             </li>             <li>                 @html.labelfor(m => m.password)                 @html.passwordfor(m => m.password)                 @html.validationmessagefor(m => m.password)             </li>             <li>                 @html.checkboxfor(m => m.rememberme)                 @html.labelfor(m => m.rememberme, new { @class = "checkbox" })             </li>         </ol>         <input type="submit" value="log in" />     </fieldset>      } 

and controller:

[allowanonymous]     public actionresult _loginpartial(string returnurl)     {         viewbag.returnurl = returnurl;         return partialview(new loginmodel());     }      [httppost]     [allowanonymous]     [validateantiforgerytoken]     public actionresult _loginpartial(loginmodel model, string returnurl)     {         if (modelstate.isvalid && websecurity.login(model.username, model.password,     persistcookie: model.rememberme))         {             return partialview();         }          // if got far, failed, redisplay form         modelstate.addmodelerror("", "the user name or password provided incorrect.");         return partialview(model);     } 

edits: parent view controller

[allowanonymous]     [disablecache]     public actionresult login(string returnurl ="/")     {         var path = virtualpathutility.toabsolute(returnurl);         var url = new uri(request.url, path).absoluteuri;         viewbag.returnurl = url;         return view();     } 

the problem me accessing viewbag directly in javascript. answer replace javascript this.

@section customscripts {  <script type ="text/javascript">      function onsuccess() {          var returnurl = @html.raw(json.encode(viewbag.returnurl))          window.location = returnurl;     } </script> 

}