三级下拉框连动的数据库版,三级下拉框连动的数据库版
三级下拉框连动
数据库：
location
表1 loaction 所在地表
字段
loactionid
loactionname 名字
表2 district 所在的地区表
字段
locationid
districtid
districtname
表3 village 所在的县区表
字段
districtid
villageid
villagename
<%Option Explicit%
<html
<head
<titleList</title
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"
<%
dim conn
dim rs
dim sql
dim count
dim rs1
dim sql1
dim rs2
dim sql2
dim count2
set conn=server.createobject("adodb.connection")
conn.open"provider=sqloledb;data source=192.168.0.33;uid=sa;pwd=;database=location;"
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(==所选城市的地区==",");
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
<%sql2 = "select * from village order by districtid asc"
set rs2 = conn.execute(sql2)
%
<script language = "JavaScript"
var onecount2;
onecount2=0;
subcat2 = new Array();
<%
count2 = 0
do while not rs2.eof
%
subcat2[<%=count2%] = new Array("<%= trim(rs2("villagename"))%","<%= trim(rs2("districtid"))%","<%= trim(rs2("villageid"))%");
<%
count2 = count2 + 1
rs2.movenext
loop
rs2.close
set rs2=nothing
%
onecount2=<%=count2%;
function changelocation2(villageid)
{
document.myform.village.length = 0;
var villageid=villageid;
var j;
document.myform.village.options[0] = new Option(==所选地区的县区==",");
for (j=0;j < onecount2; j++)
{
if (subcat2[j][1] == villageid)
{
document.myform.village.options[document.myform.village.length] = new Option(subcat2[j][0], subcat2[j][2]);
}
}
}
</script
</head
<body
<form name="myform" method="post"
题目：<input type="text" name="T2" size="20"
来源：<input type="text" name="T3" size="20"
分类：<select name="biglocation" onChange="changelocation(document.myform.biglocation.options[document.myform.biglocation.selectedIndex].value)" size="1"
<option selected请选择你所在的省份</option
<%
sql1 = "select * from location order by locationname asc"
set rs1 = conn.Execute (sql1)
do while not rs1.eof
%
<option value="<%=trim(rs1("locationid"))%"<%=trim(rs1("locationname"))%</option
