dedecms全文搜索功能怎么实现

<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 name="keyword" type="text" class="search-keyword" id="search-keyword" />
<select name="searchtype" class="search-option" id="search-option">
<option value="titlekeyword" selected=’1′>智能模糊搜索</option>
<option value="title">仅搜索标题</option>
</select>
<button type="submit" class="search-submit">搜索</button>
</div>
</form>

<form action="/plus/advancedsearch.php" method="post">
<div class="form">
<h4>搜索</h4>
<input type="hidden" name="mid" value="1" />
<input type="hidden" name="dopost" value="search" />

<input type="text" name="q" /> <input type="submit" name="submit" value="开始全文搜索" />
</div>
</form>