求助分页不正常

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从查询页选择查询条件后,跳转到本页,可以查询到结果,下部三个文本框内的值也是对的,得到的where语句是where tgyc='事故不明' and qukuai_id=1and youtian_id=1 ,点击下一页后,查询结果就成了空,wwhere语句变成了where tgyc <> ''and tgyc is not null and youtian_id=

<%   syoutian=trim(request.form("fyoutian"))
   if syoutian="==请选择油田==" then
    s1youtian=""
else
s1youtian="and youtian_id="&syoutian
end if
   squkuai=trim(request.form("fqukuai"))
   if squkuai="==请选择区块==" or squkuai="" then
    s1qukuai=""
else
s1qukuai=" and qukuai_id="&squkuai
end if
   stgyc=trim(request.form("tgyc"))
   if stgyc="" then
if s1youtian="" then
s1tgyc=" where tgyc <> '' and tgyc is not null"
end if
else
    s1tgyc="where tgyc='"&stgyc&"'"
end if
   sxh=1
   skey=s1tgyc&s1qukuai&s1youtian
set rs=server.createobject("adodb.recordset")
sql="select * from ziliao  "& skey &" order by jinghao DESC"
rs.open sql,conn,1,1
if rs.eof and rs.bof then %>
共有<span style="color: #FF0000"><%=totalput%></span>条符合查询条件的记录,查询条件为:<%=skey%>
<form Action="brow-taoguanyichang.asp" Method="post" align="right">
      <table border="0" width="600" cellspacing="0" cellpadding="0" height="30">
        <tr>
          <td width="100%" height="30">
            <p align="center"><%
   If currentPage <> 1 Then
      Response.Write "<A HREF=brow-taoguanyichang.asp?Page=" & showpages & ">[第一页]</A> "
      Response.Write "<A HREF=brow-taoguanyichang.asp?Page=" & (currentPage-1) & ">[上一页]</A> "
   End If
   If currentPage <> rs.PageCount Then
      Response.Write "<A HREF=brow-taoguanyichang.asp?Page=" & (currentPage+1) & ">[下一页]</A> "
      Response.Write "<A HREF=brow-taoguanyichang.asp?Page=" & totalPage & ">[最后一页]</A> "
   End If
%> 第<font color="#FF0000"><%=currentPage%></font>页，共<font color="#FF0000"><%=totalPage%></font>页
            <%   response.write " 转到：<select name='page' size=1  class=smallselsect style='BACKGROUND-COLOR:#FFE7B3;font-family: 宋体; font-size: 9pt;'>"

for i=1 to n
   response.write "<option value="& i
   if currentpage=i then
     response.write " selected"
   end if
   response.write ">"& i &"</option>"
next
  response.write "</select>"  %>
<input name="fyoutian" type="hidden" value="<%=syoutian%>">
<input name="fqukuai" type="hidden" value="<%=squkuai%>">
<input name="tgyc" type="hidden" value="<%=stgyc%>">
  <%response.write " <input class=buttonface type='submit'  value='确定'  name='cndok' style='font-family: 宋体; font-size: 9pt;'>"%>
          </td>
    </tr>
  </table>
</form>

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