jquery UI autocomplete maxheight css

<style>
    .ui-autocomplete {
        max-height: 100px;
        overflow-y: auto;
        /* prevent horizontal scrollbar */
        overflow-x: hidden;
        /* add padding to account for vertical scrollbar */
        padding-right: 20px;
    }
    /* IE 6 doesn't support max-height
     * we use height instead, but this forces the menu to always be this tall
     */
    * html .ui-autocomplete {
        height: 100px;
    }