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求助,高手请解释一下代码

 除新人区外,看帖均消费积分,请认真发帖与回帖获得积分,新人区外灌水三次永封。QQ:9901259赠积分。

求助,高手请解释一下代码

<SCRIPT>
       document.all.Layer2.style.display="none";
    document.all.Layer3.style.display="none";
    document.all.Layer4.style.display="none";
       document.all.Layer2.style.visibility="hidden";
    document.all.Layer3.style.visibility="hidden";
    document.all.Layer4.style.visibility="hidden";
function showtb(tbobj) {
       document.all.Layer1.style.display="none";
       document.all.Layer2.style.display="none";
       document.all.Layer3.style.display="none";
    document.all.Layer4.style.display="none";
tbobj.style.display="";
tbobj.style.visibility="visible";
}
</SCRIPT>  网页提示说:已完毕,但网页上有错误:
document.all.layer2.style为空或不是对象  请解释一下是什么意思,我该怎么解决这个问题.

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 除新人区外,看帖均消费积分,请认真发帖与回帖获得积分,新人区外灌水三次永封。QQ:9901259赠积分。
代码都不全怎么帮你看?

ps:怎么把技术问题发到策划社区了

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 除新人区外,看帖均消费积分,请认真发帖与回帖获得积分,新人区外灌水三次永封。QQ:9901259赠积分。

是我发错地方了

看了半天,觉得只能发到这个地方了,不经常上论坛,最近才开始接受这些的.

<!--#include file="function.asp"-->

<table width="610" border="0" align="center" cellpadding="0" cellspacing="0" bgcolor="#FFFFFF">
<tr>
  <td height="49" valign="top" background="Images/recommend.gif"><table width="87%" border="0" align="center" cellpadding="0" cellspacing="0">
    <tr>
      <td width="40%" height="39"></td>
      <td width="60%" valign="middle"><script language="JavaScript" type="text/javascript">marquee3();</script>
          <%
set rs9=server.CreateObject("ADODB.RecordSet")
rs9.Source="select top 6 * from "& db_EC_News_Table &" where checkked=1 order by newsid desc"
rs9.Open rs9.Source,conn,1,1
do while not rs9.EOF
title=trim(rs9("title"))
newsurl="E_ReadNews.asp?NewsID=" & rs9("NewsID")
newswwwurl=rs9("titleface")
%>
          <a class="middle" target="_blank" href="<%if rs9("titleface")="无" then %><%=newsurl%><% else %> <%=newswwwurl%><%end if%>" title="<%=htmlencode4(title)%>"> <img src="images/dd.gif" width="5" height="5" border="0"> <font color="<%=rs9("titlecolor")%>"><%=CutStr(htmlencode4(rs9("title")),28)%></font>  
          <%rs9.movenext
loop
rs9.close
set rs9=nothing%>
         
        </a></td>
    </tr>
  </table></td>
</tr>
<tr>
  <td>
<table width="600" border="0" align="center" cellpadding="0" cellspacing="0">
  <tr>
    <td width="226" height="217" rowspan="3" valign="middle"><table width="226" height="217" border="0" cellpadding="0" cellspacing="0">
      <tr>
        <td background="Images/pic_bg.gif"><div align="center">
          <script type="text/javascript">

<%
set rs3=server.CreateObject("ADODB.RecordSet")
rs3.Source="select top 5 *  from "& db_EC_News_Table &" where picnews=1 and goodnews=1 and checkked=1 and picname is not null order by NewsID DESC"
rs3.Open rs3.Source,conn,1,1  
for i=1 to rs3.RecordCount

response.Write "imgUrl"&i&"=""uploadfile/"&rs3("picname")&""";"&vbCrLf
response.Write "imgtext"&i&"="""&CutStr(htmlencode4(rs3("title")),30)&""""&vbCrLf
response.Write "imgLink"&i&"=escape(""E_ReadNews.asp?newsid="&rs3("Newsid")&""");"&vbCrLf
rs3.movenext
if i=5 then exit for ''那里的代码只定义了5个循环所以数据库里的只取5条就可以了
next

%>
var focus_width=206
var focus_height=176
var text_height=18
var swf_height = focus_height+text_height

var pics=imgUrl1+"|"+imgUrl2+"|"+imgUrl3+"|"+imgUrl4+"|"+imgUrl5
var links=imgLink1+"|"+imgLink2+"|"+imgLink3+"|"+imgLink4+"|"+imgLink5
var texts=imgtext1+"|"+imgtext2+"|"+imgtext3+"|"+imgtext4+"|"+imgtext5

document.write('<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" width="'+ focus_width +'" height="'+ swf_height +'">');
document.write('<param name="allowScriptAccess" value="sameDomain"><param name="movie" value="images/focus.swf"><param name="quality" value="high"><param name="bgcolor" value="#F0F0F0">');
document.write('<param name="menu" value="false"><param name=wmode value="opaque">');
document.write('<param name="FlashVars" value="pics='+pics+'&links='+links+'&texts='+texts+'&borderwidth='+focus_width+'&borderheight='+focus_height+'&textheight='+text_height+'">');
document.write('<embed src="images/focus.swf" wmode="opaque" FlashVars="pics='+pics+'&links='+links+'&texts='+texts+'&borderwidth='+focus_width+'&borderheight='+focus_height+'&textheight='+text_height+'" menu="false" bgcolor="#F0F0F0" quality="high" width="'+ focus_width +'" height="'+ focus_height +'" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />');  document.write('</object>');
            </script>
        </div></td>
      </tr>
    </table></td>
    <td width="374" height="200" align="left" valign="top"><center>
        <table width="98%" border="0" cellspacing="2" cellpadding="0">
                            <% set rs99=server.CreateObject("ADODB.RecordSet")
        rs99.Source="select top 1 * from "& db_EC_News_Table &" where daodu=1 and  checkked=1 order by newsid desc"
        rs99.Open rs99.Source,conn,1,1
        title=trim(rs99("title"))%>
<tr>
            <td height="40" colspan="2" align="center" bgcolor="#FFF4D9"><table width="100%" border="0" cellpadding="0" cellspacing="1" bgcolor="#F0F0F0">
              <tr>
                <td width="6%" height="36" bgcolor="#FFFFFF"><img src="Images/toutiao.gif" width="19" height="40" /></td>
                <td width="94%" bgcolor="#FFFFFF"><a class="daodu" target="_blank" href="E_ReadNews.asp?NewsId=<%=rs99("newsid")%>" title="<%=CutStr(nohtml(rs99("title")),100)%>"><%=CutStr(htmlencode4(title),24)%> </a></td>
              </tr>
            </table></td>
</tr>
            <%
rs99.close
set rs99=nothing
%>
          <% set rs9=server.CreateObject("ADODB.RecordSet")
        rs9.Source="select top 7 * from "& db_EC_News_Table &" where goodnews=1  and  checkked=1 order by newsid desc"
        rs9.Open rs9.Source,conn,1,1
        if rs9.EOF then
        Response.Write "<tr><td align=center>目前暂无推荐内容</td></tr>"
        end if
        do while not rs9.EOF
                        if showyear=1 then
                        datetime="<font class=newsdate>(" & year(rs9("UpdateTime"))  &"-"& Month(rs9("UpdateTime"))  &"-"& Day(rs9("UpdateTime")) &")</font>"
                else
                        datetime="<font class=newsdate>(" & year(rs9("UpdateTime"))  &"-"& Month(rs9("UpdateTime"))  &"-"& Day(rs9("UpdateTime")) &")</font>"
                        end if
        title=trim(rs9("title"))%>
          <tr>
            <td  height="20">  <img src="Images/dd.gif" width="4" height="4">  <a class="tj" target="_blank" href="E_ReadNews.asp?NewsId=<%=rs9("newsid")%>" title="<%=CutStr(nohtml(rs9("Content")),100)%>"> <%=CutStr(htmlencode4(title),38)%></a></td>
            <td  align="right"><%=datetime%></td>
          </tr>
                    <tr>
              <td height="1" colspan="2" background="IMAGES/bg_line.gif"></td>
              </tr>
          <%rs9.movenext
        loop
        rs9.close
        set rs9=nothing%>
        </table>
        </center></td>
  </tr>
</table>
   </td>
  </tr>
    <tr>
    <td> </td>
  </tr>
</table>
<table width="610" border="0" align="center" cellpadding="0" cellspacing="0">
  <tr>
    <td height="5" colspan="2"><div align="center">
      <script language="JavaScript" src="./zongg/ad.asp?i=12" type="text/javascript"></script>
    </div></td>
  </tr>
   <tr>
    <td height="5" colspan="2"></td>
  </tr>
</table>
<SCRIPT>
       document.all.Layer2.style.display="none";
           document.all.Layer3.style.display="none";
           document.all.Layer4.style.display="none";
       document.all.Layer2.style.visibility="hidden";
           document.all.Layer3.style.visibility="hidden";
           document.all.Layer4.style.visibility="hidden";

function showtb(tbobj) {
       document.all.Layer1.style.display="none";
       document.all.Layer2.style.display="none";
       document.all.Layer3.style.display="none";
           document.all.Layer4.style.display="none";

        tbobj.style.display="";
        tbobj.style.visibility="visible";

}
</SCRIPT>



<map name="Map" id="Map">
<area onmouseover=javascript:showtb(Layer1); shape="rect" coords="8,14,72,43">
<area onmouseover=javascript:showtb(Layer2); shape="rect" coords="96,14,160,43">
<area onmouseover=javascript:showtb(Layer3); shape="rect" coords="182,15,250,44">
<area onmouseover=javascript:showtb(Layer4); shape="rect" coords="273,14,341,42">
</map>

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