index.asp代码如下：
<html>
<head>
<title></title>
<meta content="text/html; charset=gb2312" http-equiv="content-type">
<style type="text/css"><!--
FONT{font-size:12px}
TD{font-size:12px}
A{color:#333399}
A:hover{color:#FF6600}
--></style>
<script language="Javascript" type="text/Javascript"><!--
function funOnload(){
document.all.list_file.src="jscript_city.asp?base=0&sele=0-&elem=Select01";
}
//pBase级数，以0基，
//pSele是<option 的value值
//pEle是下一级的表单名字
function chgSelect(pBase,pSele,pElem){
//当改变了一个列表之后。清除以后的列表的值。
for(i=parseInt(pElem.replace("Select",""));i<=5;i++){
var tmp="000"+i;
var pElem1=eval("document.Form1.Select"+tmp.substr(tmp.length-2));
pElem1.length=1;
pElem1.selectedIndex=0;
}
//JS用ASP得到数据库的数据来更新下级列表
document.all.list_file.src="jscript_city.asp?base="+pBase+"&sele="+pSele+"&elem="+pElem+"&t=" + new Date().getTime();
}
//--></script>
<script id="list_file" language="Javascript" type="text/Javascript" src=""></script>
</head>
<body bgcolor="#FFFFFF" leftmargin="0" topmargin="2" text="#333333" onLoad="funOnload();">
<form name="Form1">
<select name="Select01" onChange="chgSelect(1,this.options[this.selectedIndex].value,'Select02')">
<option value="">省...</option>
</select>
<select name="Select02" onChange="chgSelect(2,this.options[this.selectedIndex].value,'Select03')">
<option value="">市...</option>
</select>
<select name="Select03" onChange="chgSelect(3,this.options[this.selectedIndex].value,'Select04')">
<option value="">县...</option>
</select>
<select name="Select04" onChange="chgSelect(4,this.options[this.selectedIndex].value,'Select05')">
<option value="">乡...</option>
</select>
<select name="Select05">
<option value="">村...</option>
</select>
</form>
</body></html>
jscript_city.asp代码如下：
<%
' varBase 下拉菜单等级
' varSele 所选择下拉菜单项的数据库ID
' varElem 下一级的表单名称
varBase=Request.QueryString("base")
varSele=Left(Request.QueryString("sele"),InStr(Request.QueryString("sele"),"-")-1)
varElem=Request.QueryString("elem")
varDistName=""
varAutoID=""
Set conDB=Server.CreateObject("ADODB.CONNECTION")
conDB.Open "Driver={Microsoft Access Driver (*.mdb)};DBQ="&Server.Mappath("db1.mdb")
sqlCommand="select * from table1 where filed1="&varBase&" and filed2="&varSele
Set rsRecord=conDB.Execute(sqlCommand)
While Not rsRecord.eof
varDistName=varDistName&chr(34)&rsRecord("filed3")&chr(34)
varAutoID=varAutoID&chr(34)&rsRecord("id")&chr(34)
rsRecord.movenext
If Not rsRecord.Eof Then
varDistName=varDistName&","
varAutoID=varAutoID&","
End If
Wend
Response.Write("var varDistName=new Array("&varDistName&")"&vbcrlf)
Response.Write("var varAutoID=new Array("&varAutoID&")"&vbcrlf)
Response.Write("var varElem=eval("&chr(34)&"document.Form1."&varElem&chr(34)&")"&vbcrlf)
Response.Write("varElem.length=varDistName.length+1;"&vbcrlf)
Response.Write("for(var i=0;i<varDistName.length;i++){"&vbcrlf)
Response.Write(" varElem.options[i+1].text=varDistName[i];"&vbcrlf)
Response.Write(" varElem.options[i+1].value=varAutoID[i]+'-'+varDistName[i];"&vbcrlf)
Response.Write("}"&vbcrlf)
Response.Write("varElem.selectedIndex=0;"&vbcrlf)
%>
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