Should I change this code:
<form action="<?php echo osc_base_url(true) ; ?>" method="get" class="search" onsubmit="javascript:return doSearch();">
<input type="hidden" name="page" value="search" />
<fieldset class="main">
<input type="text" name="sPattern" id="query" value="<?php echo osc_esc_html( ( osc_search_pattern() != '' ) ? osc_search_pattern() : $sQuery ); ?>" />
<?php if ( osc_count_categories() ) { ?>
<?php osc_categories_select('sCategory', null, __('Select a category', 'italia')) ; ?>
<?php } ?>
<button type="submit"><?php _e('Search', 'italia') ; ?></button>
</fieldset>
<div id="search-example"></div>
</form>