Hello,

You need to add handler for the "Initialize" client side event:

Next you need to define that client side handler function:

    <script type="text/javascript">
        function dtInit(dtObj, e) {
            dtObj.get_element().style.width = '130px';
            dtObj.get_element().style.height = '50px';
        }
    </script>

Please, let us know if this helped you!