如果你想改成按频道来搜索，应该换成4.03版一样的搜索表单。即将2005版中的搜索表单代码：

<form name=search action={$installdir}search.asp method=post>
          <tr>
            <td width=120><img height=29 src="            <td align=middle>
  <input type=radio checked value=article name=modulename> 文章
  <input type=radio value=soft name=modulename> 下载
  <input type=radio value=photo name=modulename> 图片
  <input id=keyword maxlength=50 value=关键字 name=keyword>
  <input id=submit type=submit value=·搜索· name=submit>
              <input id=field type=hidden value=title name=field></td>
          </tr>
</form>

改成如下类似的代码（注意两者的红色代码区别）：

<form name=""search"" method=""post"" action=""article/search.asp"">
                    <input name=""keyword"" type=""text"" id=""keyword"" value=""关键字"" size=""16"" maxlength=""50"">
                    <input name=""submit"" type=""submit"" id=""submit"" value=""搜索"">
                    <br>
                    <input name=""channel"" type=""radio"" value=""article"" style=""border:0"" checked onclick=""javascript:document.search.action='article/search.asp';document.search.field.value='title';"">
                    文章   
                    <input type=""radio"" name=""channel"" value=""soft"" style=""border:0"" onclick=""javascript:document.search.action='soft/search.asp';document.search.field.value='softname';"">
                    下载<br>
                    <input type=""radio"" name=""channel"" value=""photo"" style=""border:0"" onclick=""javascript:document.search.action='photo/search.asp';document.search.field.value='photoname';"">
                    图片   
                    <input type=""radio"" name=""channel"" value=""bbs"" style=""border:0"" onclick=""javascript:document.search.action='bbs/queryresult.asp?stype=2&psearch=1&searchdate=all&stable=bbs1&boardid=0';document.search.field.value='title';"">
                    论坛<br>
                    <input name=""field"" type=""hidden"" id=""field"" value=""title"">
                  </form>