织梦dedecms网站怎么实现按栏目分类搜索的方法

<form action="{dede:field name='phpurl'/}/search.php" name="formsearch">        <div class="form">          <h4>搜索</h4>           <input type="hidden" name="kwtype" value="0" />          <input type="hidden" name="searchtype" value="titlekeyword" />           <input name="keyword" type="text" class="search-keyword" id="search-keyword" />           <select name="typeid" class="search-option" id="typeid"> <option value='0' selected='1'>全部栏目</option>{dede:channelartlist typeid='top' }{dede:type} <option value='[field:id/]'>[field:typename/]</option>{/dede:type}{dede:channel type='son' noself='yes'}<option value='[field:id/]'>-[field:typename/]</option>{/dede:channel}{/dede:channelartlist}</select><button type="submit" class="search-submit">搜索</button>        </div>        </form>