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Two cascading forms using code

Source: Internet
Author: User
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<html>
<head>
<title></title>
<meta http-equiv= "Content-type" content= "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", ["Sport", "Music", "Game", "Film and Television", "Model", "anime", "reading", "Hot topic", "Pet"]);

Dsy.add ("0_0", ["Ball Game", "Non ball Games", "other"]);
Dsy.add ("0_1", ["Pop music", "Non pop music", "other"]);
Dsy.add ("0_2", ["Network Game", "Single Game", "other"]);
Dsy.add ("0_3", ["film", "drama", "Other"]);
Dsy.add ("0_4", ["Anime Model", "film Model", "other"]);
Dsy.add ("0_5", ["Anime", "Comics", "Other"]);
Dsy.add ("0_6", ["Books", "Newspapers", "magazines", "Other"]);
Dsy.add ("0_7", ["Spoof Class", "Fashion Class", "other"]);
Dsy.add ("0_8", ["Living Pet", "other"]);
-->
</SCRIPT>
<script LANGUAGE = javascript>


var s=["S1", "S2"];
var opt0 = [Please select, select];
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" >
<select id= "S1" ><option></option></select>
<select ID = "S2" ><option></option></select>
</form>
</body>
 

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