When I Return Json From Controller Then It Directly Show Result In Web Browser Insetead Of Diaplay Alert Which I Use In Mvc With Help Of Ajax

[HttpPost]
      public ActionResult Create(RegisterationVieModel model, HttpPostedFileBase imageUpload)
      {
          string message = "";
          if (imageUpload != null)
          {
              string pic = System.IO.Path.GetFileName(imageUpload.FileName);
              string path = Server.MapPath("~/Images/" + pic);
              imageUpload.SaveAs(path);
          }
          if (ModelState.IsValid)
          {
              message = _Data.Insert(model, imageUpload);
              //return Json(new{message});
              return Json(new { message=message });
          }
          else
          {
              message = _Data.Insert(model, imageUpload);
              return new JsonResult { Data = message };
         }
      }

@model StudentRegisterationForm.ViewModel.RegisterationVieModel
@{
    HtmlHelper.ClientValidationEnabled = true;
    ViewBag.Title = "Create";
  //  Layout = "~/Views/Shared/_LayoutPage1.cshtml";
    
}


@using (Html.BeginForm("Create", "RegisterForm", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
    Html.ValidationSummary(false, "Please Resolve The Following Error","Error");
    //Html.ValidationSummary(true);
   <div>
    <table class="table">
        <tr>
            <td>@Html.DisplayNameFor(model=>model.RegisterForm.StudenName)</td>
            <td>@Html.TextBoxFor(model=>model.RegisterForm.StudenName)</td>
            <td>@Html.ValidationMessageFor(model=>model.RegisterForm.StudenName)</td>
        </tr>
        <tr>
            <td>@Html.DisplayNameFor(model=>model.RegisterForm.Age)</td>
            <td>@Html.TextBoxFor(model=>model.RegisterForm.Age)</td>
                <td>@Html.ValidationMessageFor(model=>model.RegisterForm.Age)</td>
        </tr>
        <tr>
            <td>Male</td>
            <td>@Html.RadioButtonFor(model => model.RegisterForm.Gender, "Male")</td>
           
            <td>Female</td> <td>@Html.RadioButtonFor(model => model.RegisterForm.Gender, "Female")</td>
                <td>@Html.ValidationMessageFor(model=>model.RegisterForm.Gender)</td>
        </tr>
        <tr>
            
            <td>@Html.DisplayNameFor(model=>model.RegisterForm.Email)</td>
            <td>@Html.TextBoxFor(model=>model.RegisterForm.Email)</td>
                <td>@Html.ValidationMessageFor(model=>model.RegisterForm.Email)</td>
        </tr>
        <tr>
            <td>@Html.DisplayNameFor(model=>model.RegisterForm.Password)</td>
            <td>@Html.PasswordFor(model=>model.RegisterForm.Password)</td>
                <td>@Html.ValidationMessageFor(model=>model.RegisterForm.Password)</td>
        </tr>
        <tr>
            <td>@Html.DisplayNameFor(model=>model.RegisterForm.Address)</td>
            <td>@Html.TextAreaFor(model=>model.RegisterForm.Address)</td>
            <td>@Html.ValidationMessageFor(model=>model.RegisterForm.Address)</td>
        </tr>
        <tr>
            <td>@Html.DisplayNameFor(model=>model.RegisterForm.Image)</td>
            <td><input type="file" id="imageUpload" name="imageUpload" /></td>
        </tr>
        <tr>
            <td>
                @Html.DisplayNameFor(model => model.RegisterForm.city.CityName)
            </td><td>Countary</td>
            <td>@Html.DropDownListFor(model => model.RegisterForm.CountaryID, new SelectList(Model.CountaryList, "CountaryID", "CountaryName"), "--Select--")</td>
             <td>@Html.ValidationMessageFor(model=>model.RegisterForm.CountaryID)</td>
             <td>State</td><td>@Html.DropDownListFor(model => model.RegisterForm.StateID, new SelectList(Model.StateList, "StateID", "StateName"), "---Select--")</td>
            <td>@Html.ValidationMessageFor(model=>model.RegisterForm.StateID)</td>
            <td>City</td><td>@Html.DropDownListFor(model => model.RegisterForm.CityID, new SelectList(Model.CityList, "CityID", "CityName"), "---Select")</td>
            <td>@Html.ValidationMessageFor(model=>model.RegisterForm.CityID)</td>
        </tr>
        <tr><td><input type="submit" id="insert" value="Submit" /></td></tr>
       
    </table>
     </div>
     <div id="Error">
            @Html.ValidationSummary(false)
        </div>
    }

@*Script Portion of Student Registeration Project *@

    @section script{
       <script src="~/Scripts/jquery-ui.js"></script>
<script src="~/Scripts/jquery.validate.js"></script>
<script src="~/Scripts/jquery.validate.min.js"></script>
<script src="~/Scripts/jquery.validate.unobtrusive.js"></script>
<script src="~/Scripts/jquery-1.8.2.js"></script>
<script src="~/Scripts/jquery.unobtrusive-ajax.js"></script>
<script src="~/Scripts/jquery.unobtrusive-ajax.min.js"></script>
@*<script src="~/Scripts/jquery-1.9.1.js"></script>*@
<script src="~/Scripts/jquery-1.9.1.min.js"></script>
         <script type="text/javascript">
             $(document).ready(function () {
                 $("#insert").click(function () {
                         var dataObject =
                         {
                             StudenName: $("#StudentName").val(),//}fetch the values 
                             Age: $("#Age").val(),               
                             Email: $("#Email").val(),
                         }

                         $.ajax(
                  
                             {
                         type: "POST",
                        @* url: '@Url.Action("Create", "RegisterForm")',*@
                         url: '/RegisterForm/Create',
                    data: dataObject,
                    ContentType: "application/json",
                    dataType: "json",
                         
                    success: function (data) {
                        if (data == "Save") {
                            alert("Data Save");
                        }
                        if (data == "Exist") {
                            alert("Data Exist");
                        }
                    },
                    error: function (data) {
                        if (data.toString() == "Not Save") {
                            alert("Data Not Save");
                        }
                    },
                })

            })
        })
    </script>
}