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<%
option explicit
———阿舜作品更新于2001.3.11————-
数据库结构和上次发表的同样
三级下拉框连动
数据库：
location
表1 loaction 所在地表
字段
loactionid （主键）
loactionname 名字
表2 district 所在的地区表
字段
locationid （主键）
districtid
districtname
表3 village 所在的县区表
字段
districtid （主键）
villageid
villagename
%>
<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
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"><br>
来源：<input type="text" name="t3" size="20"><br>
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>
<%
rs1.movenext
loop
rs1.close
set rs1 = nothing
conn.close
set conn = nothing
%>
</select>
<select name="smalllocation" onchange="changelocation2(document.myform.smalllocation.options[document.myform.smalllocation.selectedindex].value)">
<option selected value="">==所有地区==</option>
</select>
<select name="village" size="1">
<option selected>==所有县区==</option>
</select>
<br>
关键词：<input type="text" name="t4" size="20"><br>
内容：<textarea rows="9" name="s1" cols="51"></textarea>
</form>
</body>
</html>
