Client validation error does not prevent submit & ajax request

I use Yii client validation to validate some inputs, and when an error occurs in user input, Yii client validation does not prevent submission and does not prevent ajax request. I use the carvw-grid grid widget, and when the user clicks the submit button, he makes an ajax request to update the carvw-grid content with the results. I want to prevent submit and ajax request when there is a client validation error.

here is my script code:

Yii::app()->clientScript->registerScript('search', "
$('.search-button').click(function(){
$('.myloading').show();
$('.myshow').hide();
$('.myresult').slideUp().delay(3000).queue(function() {
    $(this).show();
    $('.myloading').hide();
    $('.myloading').addClass('myshow');
    });
    });

$('.search-form form').submit(function(){
    $.fn.yiiGridView.update('carvw-grid', {
        data: $(this).serialize()
    });
    return false;
});
");

and here is my form

<?php $form=$this->beginWidget('CActiveForm', array(
    'id'=>'carvw-form',
    'action'=>Yii::app()->createUrl($this->route),
    'method'=>'get',
    'enableAjaxValidation'=>false,
    'enableClientValidation'=>true,
    'focus'=>array($model,'OWNER_ID'),
    'clientOptions' => array('validateOnSubmit'=>true, 'validateOnType'=>true),

)); ?>

and here is my submit button

<div class="row buttons">
    <?php echo CHtml::submitButton('search',array('class'=>'search-button')); ?>
</div>

and here is my grid

<?php 
    $this->widget('zii.widgets.grid.CGridView', array(
    'id'=>'carvw-grid',
    'dataProvider'=>$model->search(),

    'columns'=>array('CAR_COMPANY_NAME','MODEL_YEAR',
        'CAR_COLOR_NAME',
        'USING_TYPE_NAME',array(
            'class'=>'CButtonColumn',
        ),
    ),
));

 ?>

How can I prevent submit and ajax requests for client validation errors?