CInlineValidator::clientValidateAttribute($object,$attribute)

Hi.

Propose ti change method to 

```php
public function clientValidateAttribute($object,$attribute)
{
	if($this->clientValidate!==null)
	{
		$method=$this->clientValidate;
		return $object->$method($attribute, $this->params);
	}
}
```

it would help to write more convenient js-validators, using additional parameters, such as $ params ['message']

```php
public function clientValidate123($attribute, $params)
{
    if(!isset($params['message']))
        $params['message']='Value should be 123';

    $js = "if(value != '123') { messages.push('" . $params['message'] . "'); }";
    return $js;
}
```