求助“关于产品模糊搜索问题”

大家好！请高手指点，原产品网站不能模糊搜索，一定要输入关键词才行的。想不输入即可搜索，麻烦各位啦！以下是一些代码：(网站为：www.gzpk.cn 左边“产品搜索”那里)我把原完整的代码放上来，麻烦各位帮我看看以下是syscode.asp文件<%
dim strFileName,MaxPerPage,ShowSmallClassType
dim totalPut,CurrentPage,TotalPages
dim BeginTime,EndTime
dim founderr, errmsg
dim BigClassName,SmallClassName,SpecialName,keyword,strField
dim rs,sql,sqlArticle,sqlDown,rsArticle,rsDown,sqlSearch,rsSearch,sqlBigClass,rsBigClass,sqlBigClass_Down,sqlSpecial,rsSpecial
dim SpecialTotal
BeginTime=Timer
BigClassName=Trim(request("BigClassName"))
SmallClassName=Trim(request("SmallClassName"))
SpecialName=trim(request("SpecialName"))
keyword=trim(request("keyword"))
if keyword<>"" then 
keyword=replace(replace(replace(replace(keyword,"'","‘"),"<","&lt;"),">","&gt;")," ","&nbsp;")
end if
strField=trim(request("Field"))if request("page")<>"" then
    currentPage=cint(request("page"))
else
currentPage=1
end ifsqlBigClass="select * from BigClass order by BigClassID"
Set rsBigClass= Server.CreateObject("ADODB.Recordset")
rsBigClass.open sqlBigClass,conn,1,1sqlBigClass_Down="select * from BigClass_Down order by BigClassID"
Set rsBigClass_Down= Server.CreateObject("ADODB.Recordset")
rsBigClass_Down.open sqlBigClass_Down,conn,1,1
'=================================================
'过程名：ShowSearchTerm
'作  用：显示搜索条件信息
'参  数：无
'=================================================
sub ShowSearchTerm()
response.write "|&nbsp;产品搜索&nbsp;&gt;&gt; "
if BigClassName<>"" then
response.write "<a href='Product.asp?BigClassName=" & BigClassName & "'>" & BigClassName & "</a>&nbsp;&gt;&gt;&nbsp;"
if SmallClassName<>"" then
response.write "<a href='Product.asp?BigClassName=" & BigClassName & "&SmallClassName=" & SmallClassName & "'>" & SmallClassName & "</a>&nbsp;&gt;&gt;&nbsp;"
else
response.write "所有小类&nbsp;&gt;&gt;&nbsp;"
end if
end if
if keyword<>"" then
  select case strField
case "Title"
response.Write "名称中含有 <font color=red>"&keyword&"</font> 的产品"
case "Content"
response.Write "说明含有 <font color=red>"&keyword&"</font> 的产品"
case else
response.Write "名称中含有 <font color=red>"&keyword&"</font> 的产品"
  end select
else
  response.write "&nbsp;所有产品"
end if
end sub______________________________________________________以下为search.asp文件：<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<%
ShowSmallClassType=ShowSmallClassType_Search
MaxPerPage=MaxPerPage_Search
strFileName="Search.asp?Field=" & strField & "&Keyword=" & keyword & "&BigClassName=" & BigClassName & "&SmallClassName=" & SmallClassName 
%>
<!-- #include file="Head.asp" -->
<table width="100%" height="8"  border="0" cellpadding="0" cellspacing="0" background="Img/contopbg.gif">
  <tr>
    <td><table width="226" height="8" border="0" cellpadding="0" cellspacing="0">
        <tr>
          <td width="209"></td>
          <td width="17" background="Img/contopbg2.gif"></td>
        </tr>
    </table></td>
  </tr>
</table>
<BODY bgColor=#666666 leftMargin=0 topMargin=0 marginheight="0" marginwidth="0"> 
<table width="770"  border="0" align="center" cellpadding="0" cellspacing="0" bgcolor="#FFFFFF">
  <tr>
    <td width="209" align="center" valign="top"><table border="0" cellspacing="0" cellpadding="0">
        <tr>
          <td ><img src="Img/login.gif" alt="ó??§μ???" width="196" height="32"></td>
        </tr>
        <tr>
          <td height="5"></td>
        </tr>
        <tr>
          <td height="10" align="center"><table  border="0" cellspacing="0" cellpadding="0">
              <tr>
                <td><img src="Img/left1.gif" width="187" height="19"></td>
              </tr>
              <tr>
                <td background="Img/left2.gif"><table width="90%" border="0" align="center" cellpadding="2" cellspacing="0">
                    <tr>
                      <td align="center">
                        <% call ShowUserLogin() %></td>
                    </tr>
                </table></td>
              </tr>
              <tr>
                <td><img src="Img/left3.gif" width="187" height="20"></td>
              </tr>
          </table></td>
        </tr>
        <tr>
          <td height="5"></td>
        </tr>
      </table>
        <table  border="0" cellspacing="0" cellpadding="0">
          <tr>
            <td height="5"></td>
          </tr>
          <tr>
            <td><img src="Img/sotop.gif" width="205" height="41"></td>
          </tr>
          <tr>
            <td align="center" background="Img/sobg.gif"><table width="92%" border="0" align="center" cellpadding="0" cellspacing="0">
                <tr>
                  <td>
                    <% call ShowSearch(1) %>
                  </td>
                </tr>
            </table></td>
          </tr>
          <tr>
            <td valign="top"><img src="Img/sotb.gif" width="205" height="6"></td>
          </tr>
        </table>
        <table width="96%" border="0" align="center" cellpadding="0" cellspacing="0">
          <tr>
            <td align="center"></td>
          </tr>
          <tr>
            <td>
              <div align="center">
                <table width="98%"  border="0" cellspacing="0" cellpadding="0">
                  <tr>
                    <td height="5"></td>
                  </tr>
                  <tr>
                    <td><img src="Img/shang.gif" width="203" height="33"></td>
                  </tr>
                </table>
                <table width="92%" border="0" align="center" cellpadding="0" cellspacing="0">
                  <tr>
                    <td>
                      <% call ShowSmallClass_Tree() %>
                    </td>
                  </tr>
                </table>
            </div></td>
          </tr>
          <TR>
            <TD 
                            height=3 colspan="2"></TD>
          </TR>
        </table>
        <p>&nbsp;</p>
        <p>&nbsp;</p></td>
    <td width="17" background="Img/combg.gif">&nbsp;</td>
    <td valign="top"><table width="98%" border="0" align="center" cellpadding="0" cellspacing="0">
        <tr>
          <td><table width="100%"  border="0" cellspacing="0" cellpadding="0">
              <tr>
                <td height="2"></td>
              </tr>
              <tr>
                <td height="26">&nbsp; <span >&nbsp;&nbsp;<img src="Img/HaoSc23.png" width="14" height="16" align="absmiddle"> <span class="tt_16">产 品 搜 索</span></span></td>
              </tr>
              <tr>
                <td height="2" bgcolor="#CBE0E9"></td>
              </tr>
          </table></td>
        </tr>
      </table>
      <table width="98%" border="0" align="center" cellpadding="0" cellspacing="0">
        <tr>
          <td width="453" 
                  height=28>
            <% call ShowClassGuide() %>
          </td>
          <td width="102">
            <% call ShowArticleTotal() %>
          </td>
        </tr>
        <tr>
          <td 
                  height=1 colspan="2" background=img/naBialym.gif><img height=1 src="img/1x1_pix.gif" 
              width=10></td>
        </tr>
        <tr>
          <td 
                  height=1 colspan="2">
            <% call ShowSearchResult() %>
          </td>
        </tr>
        <tr>
          <td 
                  height=1 colspan="2">
            <%
  if totalput>0 then
  call showpage(strFileName,totalput,MaxPerPage,false,true,"个产品")
  end if
  %>
          </td>
        </tr>
      </table></td>
  </tr>
</table>麻烦各位大侠们帮忙啦！网站是www.gzpk.cn 左边的“产品搜索”框