Genesis - Modify Search for Adsense

// Replace genesis_search_form function for inclusion of adsense code
// Change partner-pub numeric to agree with adsense account
add_filter( 'get_search_form', 'custom_adsense_search_form' );

/*** Replace the default search form with a Adsense-specific form. **/
function custom_adsense_search_form() {

    $search_text = get_search_query() ? esc_attr( apply_filters( 'the_search_query', get_search_query() ) ) : apply_filters( 'genesis_search_text', esc_attr__( 'Search this website', 'genesis' ) . '…' );

    $button_text = apply_filters( 'genesis_search_button_text', esc_attr__( 'Search', 'genesis' ) );

    $onfocus = " onfocus=\"if (this.value == '$search_text') {this.value = '';}\"";
    $onblur  = " onblur=\"if (this.value == '') {this.value = '$search_text';}\"";

    /** Empty label, by default. Filterable. */
    $label = apply_filters( 'genesis_search_form_label', '' );

    $form = '
        <form method="get" class="searchform search-form" action="http://www.google.com.au/cse" id="cse-search-box" target="_blank" />
            ' . $label . '
            <input type="hidden" name="cx" value="partner-pub-0000000000000000:zghc4b-vsqt" />
            <input type="hidden" name="ie" value="ISO-8859-1" />
            <input type="text" value="' . esc_attr( $search_text ) . '" name="s" class="s search-input"' . $onfocus . $onblur . ' />
            <input type="submit" name="sa" class="searchsubmit search-submit" value="' . esc_attr( $button_text ) . '" />
        </form>
        <script type="text/javascript" src="http://www.google.com.au/cse/brand?form=cse-search-box&amp;lang=en"></script>
    ';

    return apply_filters( 'custom_adsense_search_form', $form, $search_text, $button_text, $label );

}