Show all model validation errors on top of the page in cakePHP
===

I am new to CakePHP. When I am using `Model Field Validations` then it is showing error message infront of each required form field. I want to show it in a div at the top of the form. How I can implement it. Thanks in advance.
Here is my Code:
Model:

    <?php
    class User extends AppModel {
    public $validate = array(
        'username' => array(
            'required' => array(
                'rule' => array('notEmpty'),
                'message' => 'A username is required'
            ),
	     array(
        'rule'    => array('minLength', 8),
        'message' => 'Username must be at least 6 characters long'
         )
        ),
        'password' => array(
            'required' => array(
                'rule' => array('notEmpty'),
                'message' => 'A password is required'
            )
        ),
         'city' => array(
            'required' => array(
                'rule' => array('notEmpty'),
                'message' => 'A City is required'
            )
        ),
         'state' => array(
            'required' => array(
                'rule' => array('notEmpty'),
                'message' => 'A State is required'
            )
        ),
        'role' => array(
            'valid' => array(
                'rule' => array('inList', array('admin', 'author')),
                'message' => 'Please enter a valid role',
                'allowEmpty' => false
            )
        )
    );

    }

UsersController.php

    public function add() {
        $this->set('states_options', $this->State->find('list', array('fields' =>array('id','name') )));
			$this->set('cities_options', array());
        if ($this->request->is('post')) {
        	$this->User->set($this->request->data);
        	if($this->User->validates())
        	{
            $this->User->create();
            if ($this->User->save($this->request->data)) {
                $this->Session->setFlash(__('The user has been saved'));
                $this->redirect(array('action' => 'index'));
            } else {
                $this->Session->setFlash(__('The user could not be saved. Please, try again.'));
            }
         }
         else {
         	$errors = $this->User->validationErrors;
				$this->set('ValidateAjay',$errors);         	
         	//pr($errors);die;
        	}
        }
    }

User View:

    <!--<script src="http://code.jquery.com/jquery-1.7.2.js"></script>-->
    <script>
    $(document).ready(function(){
    $('#UserState').change(function(){
      var stateid=$(this).val();
      $.ajax({
      type: "POST",
      url: "checkcity",
      data:'stateid='+stateid+'&part=checkcity',
      success: function(data) {
      $("#city_div").html(data);
      }
      });
    });
    });
    </script>
    <div class="users form">
    <?php
     if(!empty($ValidateAjay)){
     pr($ValidateAjay);
     }
     echo $this->Form->create('User'); ?>
     <fieldset>
        <legend><?php echo __('Add User'); ?></legend>
    <?php
        echo $this->Form->input('username');
        echo $this->Form->input('password');
        echo $this->Form->input('state', array('options' => $states_options , 'empty' => 'Select State'  ));	
        ?>
       <div id="city_div">
       <?php
        echo $this->Form->input('city', array('options' => $cities_options, 'empty' => 'Select City' ));
        ?>
        </div>
       <?php
        echo $this->Form->input('role', array(
            'options' => array('admin' => 'Admin', 'author' => 'Author')
        ));
    ?>
    </fieldset>
    <?php echo $this->Form->end(__('Submit')); ?>
     </div>





