Random Data Retrieve Problem

Yii 1.1 General Discussion
1

I’m using CActiveDataProvider to provide data for a photo gallery. I want to show photos as random just every time whole page loads but code below repeat randomization every time that I change the page. How can I do it?


$dataProvider = new CActiveDataProvider('Artworks',array(

	    'criteria'=>array(

		'order'=>'RAND() DESC',

	    ),

            'pagination'=>array(

            'pageSize'=>6,

            ),

        ));