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三级下拉框连动的数据库版！

作者： unknow

<%
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>

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