On my MVC project I have a Login page that works perfectly in Chrome, but in IE (11) I get the following error:

> 
> SCRIPT438: Object doesn't support property or method 'valid'
> 
> 
> 

This is my code:

```
if (!$('#formLogin').valid()) {
   return false;
}

```

I'm using jquery 1.11.1

The Login form:

```
<form id="formLogin" data-bind="submit: login">
   <label>User ID</label>
   <input class="required email form-control" type="text" data-bind="value: loginUserName" name="loginUserName" />

   <label>Password</label>
   <input class="required form-control" type="password" data-bind="value: loginPassword" name="loginPassword" />

   <button type="submit" class="btn-orange" id="buttonLogin" data-bind="visible: showLoginButton">Log In</button> 
   <button data-bind="click: logout, visible: showLogoutButton" class="btn-orange" id="buttonLogout">Log Out</button>
</form>

```

Any idea what can causes it?