How to show errors in client side in Laravel - php

Question

How can I show errors in client side with Laravel controller in Laravel 4.2?
I want to show this error:
D:\xampp\htdocs\guestlara\app\views\index.php(51): Illuminate\Exception\Handler->handleError(8, 'Undefined varia...', 'D:\xampp\htdocs...', 51, Array)
public function login_user() {
$rules = array(
'email'=> 'Required|Between:3,64|Email|Unique:users',
'password'=>'Required|AlphaNum|Between:4,8|Confirmed',
);
$validator = Validator::make(Input::all(), $rules);
if ($validator->fails()) {
// get the error messages from the validator
$messages = $validator->messages();
log::error($messages);
// redirect our user back to the form with the errors from the validator
return Redirect::to('/')->withErrors($validator);
} else {
// attempt to do the login
if (Auth::attempt($users)) {
return Redirect::to('dashboard');
} else {
return Redirect::to('/');
}
}
}
This is the HTML code:
<form action="login_user" method="post">
<div class="alert alert-info">
Message
</div>
<div class="form-group">
<label for="email">Email address</label>
<input class="form-control" name="email" placeholder="Enter Email Address" />
<div class="error"><?php echo $messages; ?></div>
</div>
<div class="form-group">
<label for="password">Password</label>
<input class="form-control" name="password" placeholder="Enter Password" />
<div class="error"><?php echo $messages; ?></div>
</div>
<input type="submit" name="submit" value="Login" class="btn btn-default">
<input type="button" name="register" value="Register" class="btn btn-default">
<input type="button" name="forgot-password" value="forgot-password" class="btn btn-default">
</form>