怎么修改搜索代码要搜索框，不要加作者与分类？

<table cellSpacing=0 cellPadding=0 name=search action=/rt/search.asp method=post>
<tr>
<td align=right>
<Input id=Keyword onfocus="this.value='';" maxLength=50 size=16 value=关键词 name=Keyword>
<Select name=select style="display:none" >
<Option value=Article selected name="ModuleName">站内资源</Option>
</Select> </td>
<td align=right <Input name=Submit type=Submit id=Submit value="搜索">
<Input id=Field type=hidden value=Title name=Field></td>
</tr>
</FORM>
</table>