How To Call A Jquery Function From The Widget

hi i m using an image slider but i want that the width of the slider should be that of the body i used jquery function to get width but unable to call it from widget kindly help if any one have idea… here is my view code




<script>

	function main()

	{

		return ($(window).width());

	}

	$(main);

</script>




<div id="imageslider">

	<?php

		

        $this->widget('ext.slider.slider', array(

            'container'=>'slideshow',

            'width'=>'$(main())',     // here i want to call the jquery function but it is unable to call it

            'height'=>240,

            'timeout'=>6000,

            'infos'=>true,

            'constrainImage'=>true,

            'images'=>array('01.jpg','02.jpg','03.jpg','04.jpg'),

            'alts'=>array('First description','Second description','Third description','Four description'),

	    'defaultUrl'=>Yii::app()->request->hostInfo

            )

        );

        ?>

</div>