实现代码如下：
<!--#include file="conn.asp"-->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>New Page 1</title>
</head>
<body>
<%
dim rs
dim sql
dim count
set rs=server.createobject("adodb.recordset")
sql = "select * from shiinfo order by id asc"
rs.open sql,conn,1,1
%>
<SCRIPT language="JavaScript">
var onecount;
onecount=0;
subcat = new Array();
<%
count = 0
do while not rs.eof
%>
subcat[<%=count%>] = new Array("<%= trim(rs("shiname"))%>","<%= trim(rs("shengcode"))%>","<%= trim(rs("id"))%>");
<%
count = count + 1
rs.movenext
loop
rs.close
%>
onecount=<%=count%>;
function changelocation(locationid)
{
document.form1.cid.length = 0;
var locationid=locationid;
var i;
for (i=0;i < onecount; i++)
{
if (subcat[i][1] == locationid)
{
document.form1.cid.options[document.form1.cid.length] = new Option(subcat[i][0], subcat[i][2]);
}
}
}
</SCRIPT>
<SCRIPT language="javascript">
<!--
function CheckForm()
{
document.form1.txtcontent.value=document.form1.doc_html.value;
return true
}
//-->
</SCRIPT>
<form name=form1 onsubmit="check()">
省份 <%
sql = "select * from shenginfo"
rs.open sql,conn,1,1
if rs.eof and rs.bof then
response.write "请先添加省份。"
response.end
else
%>
<Select name="sid" onChange="changelocation(document.form1.sid.options[document.form1.sid.selectedIndex].value)" ><%
do while not rs.eof
%><OPTION selected value="<%=trim(rs("id"))%>"><%=trim(rs("shengname"))%></OPTION>
<%
rs.movenext
loop
end if
rs.close
%>
</Select>
城市：<Select name="cid">
<OPTION selected value="">==请选城市==</OPTION>
</Select>
</form>
</body>
</html>
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