二級下拉菜單關聯(數據庫版)的簡單方法
<%
'Option Explicit
'數據庫結構和上次發表的同樣
'二級下拉框連動
'
'數據庫：
'location
'表1 loaction 所在地表
' 字段
' loactionid （主鍵）
' loactionname 名字
'表2 district 所在的地區表
' 字段
' locationid （主鍵）
' districtid
' districtname
%>
<html>
<head>
<title>List</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<%
dim rs
dim sql
dim count
dim rs1
dim sql1
dim rs2
dim sql2
dim count2
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('==所選城市的地區==','');
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>
</head>
<body>
<form name="myform" method="post">
題目：<input type="text" name="T2" size="20"><br>
來源：<input type="text" name="T3" size="20"><br>
分類：<select name="biglocation" onChange="changelocation(document.myform.biglocation.options[document.myform.biglocation.selectedIndex].value)" size="1">
<option selected>請選擇你所在的省份</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">
<option selected value="">==所有地區==</option>
</select>
<br>
關鍵詞：<input type="text" name="T4" size="20"><br>
內容：<textarea rows="9" name="S1" cols="51"></textarea>
</form>
</body>
</html>
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