名家经典散文摘抄300字:ASP 调用数据库的代码 用到的JS 是 两个相关连的 select的问题

<%
dim rs
dim sql
dim count
set rs=server.createobject("adodb.recordset")
sql = "select * from SmallClass order by SmallClassID asc"
rs.open sql,conn,1,1
%>

<script language = "JavaScript">
var onecount;
subcat = new Array();
<%
count = 0
do while not rs.eof
%>
subcat[<%=count%>] = new Array("<%= trim(rs("SmallClassName"))%>","<%= trim(rs("BigClassName"))%>","<%= trim(rs("SmallClassName"))%>");
<%
count = count + 1
rs.movenext
loop
rs.close
%>
onecount=<%=count%>;

function changelocation(locationid)
{
document.addNEWS.SmallClassName.length = 1;
var locationid=locationid;
var i;
for (i=0;i < onecount; i++)
{
if (subcat[i][1] == locationid)
{
document.addNEWS.SmallClassName.options[document.addNEWS.SmallClassName.length] = new Option(subcat[i][0], subcat[i][2]);
}
}
}
</script>

<%
sql = "select * from BigClass"
rs.open sql,conn,1,1
if rs.eof and rs.bof then
response.write "请先添加栏目。"
else
%>
<select name="BigClassName" onChange="changelocation(document.addNEWS.BigClassName.options[document.addNEWS.BigClassName.selectedIndex].value)" size="1">
<option selected value="<%=trim(rs("BigClassName"))%>"><%=trim(rs("BigClassName"))%></option>
<%
dim selclass
selclass=rs("BigClassName")
rs.movenext
do while not rs.eof
%>
<option value="<%=trim(rs("BigClassName"))%>"><%=trim(rs("BigClassName"))%></option>
<%
rs.movenext
loop
end if
rs.close
%>
</select> <select name="SmallClassName">
<option value="" selected>不指定小类</option>
<%
sql="select * from SmallClass where BigClassName='" & selclass & "'"
rs.open sql,conn,1,1
if not(rs.eof and rs.bof) then
%>
<option value="<%=rs("SmallClassName")%>"><%=rs("SmallClassName")%></option>
<% rs.movenext
do while not rs.eof%>
<option value="<%=rs("SmallClassName")%>"><%=rs("SmallClassName")%></option>
<%
rs.movenext
loop
end if
rs.close
%>
<%
ranNum=int(9*rnd)+10
iddata=month(now)&day(now)&hour(now)&minute(now)&second(now)&ranNum
%>
</select>

这是一个ASP 调用数据库的代码 用到的JS 是 两个相关连的 select 运行正常

但是 我想再加入一个代码 数据库改变 但JS 不变 结果产生冲突

求大家帮忙
问题就是 只一有个相关的下拉选择栏能用 一个失效