<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<style>
body,select
{
font-size:9pt;
font-family:Verdana;
}
a
{
color:red;
text-decoration:none;
}
a:hover{
text-decoration:underline;
}
</style>
<SCRIPT LANGUAGE="JavaScript">
<!--
function Dsy()
{
this.Items = {};
}
Dsy.prototype.add = function(id,iArray)
{
this.Items[id] = iArray;
}
Dsy.prototype.Exists = function(id)
{
if(typeof(this.Items[id]) == "undefined") return false;
return true;
}
function change(v){
var str="0";
for(i=0;i<v;i++){ str+=("_"+(document.getElementById(s[i]).selectedIndex-1));};
var ss=document.getElementById(s[v]);
with(ss){
length = 0;
options[0]=new Option(opt0[v],opt0[v]);
if(v && document.getElementById(s[v-1]).selectedIndex>0 || !v)
{
if(dsy.Exists(str)){
ar = dsy.Items[str];
for(i=0;i<ar.length;i++)options[length]=new Option(ar[i],ar[i]);
if(v)options[1].selected = true;
}
}
if(++v<s.length){change(v);}
}
}
var dsy = new Dsy();
dsy.add("0",["1","2","3","4"]);
dsy.add("0_0",["11","12","13"]);
dsy.add("0_1",["21","22","23"]);
dsy.add("0_2",["31","32","33"]);
dsy.add("0_3",["41","42","43"]);
//-->
</SCRIPT>
<SCRIPT LANGUAGE = JavaScript>
var s=["s1","s2"];
var opt0 = ["请选择","请选择"];
function setup()
{
for(i=0;i<s.length-1;i++)
document.getElementById(s[i]).onchange=new Function("change("+(i+1)+")");
change(0);
}
//-->
</SCRIPT>
</head>
<body bgcolor="#E0E0E0" onload="setup()">
<form name="frm" action="11.jsp">
<select id="s1" name="s1"><option></option></select>
<select id="s2" name="s2"><option></option></select>
<input type="submit" name="Submit" value="提交">
</form>
</body>
</html>
------
11.jsp
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%
String s1 = request.getParameter("s1");
String s2 = request.getParameter("s2");
out.println(s1);
out.println(s2);
%>
</body>
</html>
--------------------------
yinyong:http://zhidao.baidu.com/question/74257440.html