网上三级菜单多是多但是代码都比较烦,我这个应该说还是比较直观的:
'肯定先要连接数据库了,不用说了
'数据库结构
'类别1表名称:a 字段:ID,Name 说明:ID为主键是类别1的ID值,Name为类别1的名称
'类别2表名称:aa 字段:ID,aID,Name 说明:ID为主键是类别2的ID值,aID为所属类别1的ID值,Name为类别2的名称
'类别3表名称:aaa 字段:ID,aID,aaID,Name 说明:ID为主键是类别3的ID值,aID为所属类别1的ID值,aaID为所属类别2的ID值,Name为类别3的名称
=====test1.asp 你可以测试下,接收到的都是类别的ID值====
%
response.write"1:"Request.form("s1")"BR>"
response.write"2:"Request.form("s2")"BR>"
response.write"3:"Request.form("s3")"BR>"
%>
复制代码 代码如下:
!-- 三级联动菜单 开始 -->
script language="JavaScript">
!--
%
'二级数据保存到数组
Dim count2,rsClass2,sqlClass2
set rsClass2=server.createobject("adodb.recordset")
sqlClass2="select * from aa"
rsClass2.open sqlClass2,conn,1,1
%>
var subval2 = new Array();
//数组结构:一级根值,二级根值,二级显示值
%
count2 = 0
do while not rsClass2.eof
%>
subval2[%=count2%>] = new Array('%=rsClass2("aID")%>','%=rsClass2("ID")%>','%=rsClass2("Name")%>')
%
count2 = count2 + 1
rsClass2.movenext
loop
rsClass2.close
%>
%
'三级数据保存到数组
Dim count3,rsClass3,sqlClass3
set rsClass3=server.createobject("adodb.recordset")
sqlClass3="select * from aaa"
rsClass3.open sqlClass3,conn,1,1
%>
var subval3 = new Array();
//数组结构:二级根值,三级根值,三级显示值
%
count3 = 0
do while not rsClass3.eof
%>
subval3[%=count3%>] = new Array('%=rsClass3("aaID")%>','%=rsClass3("ID")%>','%=rsClass3("Name")%>')
%
count3 = count3 + 1
rsClass3.movenext
loop
rsClass3.close
%>
function changeselect1(locationid)
{
document.form1.s2.length = 0;
document.form1.s2.options[0] = new Option('==请选择类别==','');
document.form1.s3.length = 0;
document.form1.s3.options[0] = new Option('==请选择专题==','');
for (i=0; isubval2.length; i++)
{
if (subval2[i][0] == locationid)
{document.form1.s2.options[document.form1.s2.length] = new Option(subval2[i][2],subval2[i][1]);}
}
}
function changeselect2(locationid)
{
document.form1.s3.length = 0;
document.form1.s3.options[0] = new Option('==请选择专题==','');
for (i=0; isubval3.length; i++)
{
if (subval3[i][0] == locationid)
{document.form1.s3.options[document.form1.s3.length] = new Option(subval3[i][2],subval3[i][1]);}
}
}
//-->
/script>
form name="form1" method="post" action="test1.asp">
三级联动:
%
Dim count1,rsClass1,sqlClass1
set rsClass1=server.createobject("adodb.recordset")
sqlClass1="select * from a"
rsClass1.open sqlClass1,conn,1,1
%>
select name="s1" onChange="changeselect1(this.value)">
option>==请选择频道==/option>
%
count1 = 0
do while not rsClass1.eof
response.write"option value="rsClass1("ID")">"rsClass1("Name")"/option>"
count1 = count1 + 1
rsClass1.movenext
loop
rsClass1.close
%>
/select>
select name="s2" onChange="changeselect2(this.value)">
option>==请选择类别==/option>
/select>
select name="s3">
option>==请选择专题==/option>
/select>
input type="submit" name="Submit" value="提交">/form>
!-- 三级联动菜单 结束 -->
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