ASP文件：
<%@ Language=VBscript %>
<%Option Explicit%>
<html>
<head>
<title>List</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<%
dim conn
dim rs
dim sql
dim count
dim rs1
dim sql1
set conn = server.CreateObject ("adodb.connection")
conn.Open "test","sa",""
sql = "select * from district order by locationid asc"
set rs = conn.execute(sql)
%>
<script language = "Javascript">
var onecount;
onecount=0;
subcat = new Array();
<%
count = 0
do while not rs.eof
%>
subcat[<%=count%>] = new Array("<%= trim(rs("districtname"))%>","<%= trim(rs("locationid"))%>","<%= trim(rs("districtid"))%>");
<%
count = count + 1
rs.movenext
loop
rs.close
set rs=nothing
%>
onecount=<%=count%>;
function changelocation(locationid)
{
document.myform.smalllocation.length = 0;
var locationid=locationid;
var i;
document.myform.smalllocation.options[0] = new Option('====所有地区====','');
for (i=0;i < onecount; i++)
{
if (subcat[i][1] == locationid)
{
document.myform.smalllocation.options[document.myform.smalllocation.length] = new Option(subcat[i][0], subcat[i][2]);
}
}
}
</script><br></head><br><body><br><form name="myform" method="post"><br> <select name="biglocation" onChange="changelocation(document.myform.biglocation.options[document.myform.biglocation.selectedIndex].value)"><br> <%<br> <br> sql1 = "select * from location order by locationname asc"<br> set rs1 = conn.Execute (sql1)<br> do while not rs1.eof<br> %><br> <option value="<%=trim(rs1("locationid"))%>"><%=trim(rs1("locationname"))%></option><br> <%<br> rs1.movenext<br> loop<br> rs1.close<br> set rs1 = nothing<br> conn.Close<br> set conn = nothing<br> %><br> </select><br> <select name="smalllocation"><br> <option selected value="">==所有地区==</option><br> </select><br></form><br><script LANGUAGE="javascript"> <br> changelocation(document.myform.biglocation.options[document.myform.biglocation.selectedIndex].value); <br></script><br></body><br></html><br><br><br>数据库：<br>create table location<br>(<br><br>locationid char(2) not null primary key,<br>locationname char(50) not null<br><br>)<br><br><br>create table district<br>(<br><br>districtid char(3) not null primary key,<br>districtname char(50) not null,<br>locationid char(2) not null<br>) <br><br></div>
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