Code:
<html>
<head>
<script type="text/javascript" src="chainedmenu.js">
// Chained Menu
// Copyright Xin Yang 2004
// Web Site: www.yxScripts.com
// EMail: m_yangxin@hotmail.com
// Last Updated: 2004-08-23
// This script is free as long as the copyright notice remains intact.
var _disable_empty_list=false;
var _hide_empty_list=false;
// ------
///// DynamicDrive.com added function/////////////
var onclickaction="alert"
function goListGroup(){
for (i=arguments.length-1;i>=0; i--){
if (arguments[i].selectedIndex!=-1){
var selectedOptionvalue=arguments[i].options[arguments[i].selectedIndex].value
if (selectedOptionvalue!=""){
if (onclickaction=="alert")
alert(selectedOptionvalue)
else if (newwindow==1)
window.open(selectedOptionvalue)
else
window.location=selectedOptionvalue
break
}
}
}
}
///// END DynamicDrive.com added function//////
if (typeof(disable_empty_list)=="undefined") { disable_empty_list=_disable_empty_list; }
if (typeof(hide_empty_list)=="undefined") { hide_empty_list=_hide_empty_list; }
var cs_goodContent=true, cs_M="M", cs_L="L", cs_curTop=null, cs_curSub=null;
function cs_findOBJ(obj,n) {
for (var i=0; i<obj.length; i++) {
if (obj[i].name==n) { return obj[i]; }
}
return null;
}
function cs_findContent(n) { return cs_findOBJ(cs_content,n); }
function cs_findM(m,n) {
if (m.name==n) { return m; }
var sm=null;
for (var i=0; i<m.items.length; i++) {
if (m.items[i].type==cs_M) {
sm=cs_findM(m.items[i],n);
if (sm!=null) { break; }
}
}
return sm;
}
function cs_findMenu(n) { return (cs_curSub!=null && cs_curSub.name==n)?cs_curSub:cs_findM(cs_curTop,n); }
function cs_contentOBJ(n,obj){ this.name=n; this.menu=obj; this.lists=new Array(); this.cookie=""; }; cs_content=new Array();
function cs_topmenuOBJ(tm) { this.name=tm; this.items=new Array(); this.df=0; this.addM=cs_addM; this.addL=cs_addL; }
function cs_submenuOBJ(dis,link,sub) {
this.name=sub;
this.type=cs_M; this.dis=dis; this.link=link; this.df=0;
var x=cs_findMenu(sub);
this.items=x==null?new Array():x.items;
this.addM=cs_addM; this.addL=cs_addL;
}
function cs_linkOBJ(dis,link) { this.type=cs_L; this.dis=dis; this.link=link; }
function cs_addM(dis,link,sub) { this.items[this.items.length]=new cs_submenuOBJ(dis,link,sub); }
function cs_addL(dis,link) { this.items[this.items.length]=new cs_linkOBJ(dis,link); }
function cs_showMsg(msg) { window.status=msg; }
function cs_badContent(n) { cs_goodContent=false; cs_showMsg("["+n+"] Not Found."); }
function cs_optionOBJ(text,value) { this.text=text; this.value=value; }
function cs_emptyList(list) { for (var i=list.options.length-1; i>=0; i--) { list.options[i]=null; } }
function cs_refreshList(list,opt,df) {
cs_emptyList(list);
for (var i=0; i<opt.length; i++) {
list.options[i]=new Option(opt[i].text, opt[i].value);
}
if (opt.length>0) {
list.selectedIndex=df;
}
}
function cs_getOptions(menu) {
var opt=new Array();
for (var i=0; i<menu.items.length; i++) {
opt[i]=new cs_optionOBJ(menu.items[i].dis, menu.items[i].link);
}
return opt;
}
function cs_updateListGroup(content,idx,sidx,mode) {
var i=0, curItem=null, menu=content.menu;
while (i<idx) {
menu=menu.items[content.lists[i++].selectedIndex];
}
if (menu.items[sidx].type==cs_M && idx<content.lists.length-1) {
var df=cs_getIdx(mode,content.cookie,idx+1,menu.items[sidx].df);
cs_refreshList(content.lists[idx+1], cs_getOptions(menu.items[sidx]), df);
if (content.cookie) {
cs_setCookie(content.cookie+"_"+(idx+1),df);
}
if (idx+1<content.lists.length) {
if (disable_empty_list) {
content.lists[idx+1].disabled=false;
}
if (hide_empty_list) {
content.lists[idx+1].style.display="";
}
cs_updateListGroup(content,idx+1,df,mode);
}
}
else {
for (var s=idx+1; s<content.lists.length; s++) {
cs_emptyList(content.lists[s]);
if (disable_empty_list) {
content.lists[s].disabled=true;
}
if (hide_empty_list) {
content.lists[s].style.display="none";
}
if (content.cookie) {
cs_setCookie(content.cookie+"_"+s,"");
}
}
}
}
function cs_initListGroup(content,mode) {
var df=cs_getIdx(mode,content.cookie,0,content.menu.df);
cs_refreshList(content.lists[0], cs_getOptions(content.menu), df);
if (content.cookie) {
cs_setCookie(content.cookie+"_"+0,df);
}
cs_updateListGroup(content,0,df,mode);
}
function cs_updateList() {
var content=this.content;
for (var i=0; i<content.lists.length; i++) {
if (content.lists[i]==this) {
if (content.cookie) {
cs_setCookie(content.cookie+"_"+i,this.selectedIndex);
}
if (i<content.lists.length-1) {
cs_updateListGroup(content,i,this.selectedIndex,"");
}
}
}
}
function cs_getIdx(mode,name,idx,df) {
if (mode) {
var cs_idx=cs_getCookie(name+"_"+idx);
if (cs_idx!="") {
df=parseInt(cs_idx);
}
}
return df;
}
function _setCookie(name, value) {
document.cookie=name+"="+value;
}
function cs_setCookie(name, value) {
setTimeout("_setCookie('"+name+"','"+value+"')",0);
}
function cs_getCookie(name) {
var cookieRE=new RegExp(name+"=([^;]+)");
if (document.cookie.search(cookieRE)!=-1) {
return RegExp.$1;
}
else {
return "";
}
}
// ----
function addListGroup(n,tm) {
if (cs_goodContent) {
cs_curTop=new cs_topmenuOBJ(tm); cs_curSub=null;
var c=cs_findContent(n);
if (c==null) {
cs_content[cs_content.length]=new cs_contentOBJ(n,cs_curTop);
}
else {
delete(c.menu); c.menu=cs_curTop;
}
}
}
function addList(n,dis,link,sub,df) {
if (cs_goodContent) {
cs_curSub=cs_findMenu(n);
if (cs_curSub!=null) {
cs_curSub.addM(dis,link||"",sub);
if (typeof(df)!="undefined") { cs_curSub.df=cs_curSub.items.length-1; }
}
else {
cs_badContent(n);
}
}
}
function addOption(n,dis,link,df) {
if (cs_goodContent) {
cs_curSub=cs_findMenu(n);
if (cs_curSub!=null) {
cs_curSub.addL(dis,link||"");
if (typeof(df)!="undefined") { cs_curSub.df=cs_curSub.items.length-1; }
}
else {
cs_badContent(n);
}
}
}
function initListGroup(n) {
var _content=cs_findContent(n), count=0;
if (_content!=null) {
content=new cs_contentOBJ("cs_"+n,_content.menu);
cs_content[cs_content.length]=content;
for (var i=1; i<initListGroup.arguments.length; i++) {
if (typeof(arguments[i])=="object" && arguments[i].tagName && arguments[i].tagName=="SELECT") {
content.lists[count]=arguments[i];
arguments[i].onchange=cs_updateList;
arguments[i].content=content; arguments[i].idx=count++;
}
else if (typeof(arguments[i])=="string" && /^[a-zA-Z_]\w*$/.test(arguments[i])) {
content.cookie=arguments[i];
}
}
if (content.lists.length>0) {
cs_initListGroup(content,content.cookie);
}
}
}
function resetListGroup(n) {
var content=cs_findContent("cs_"+n);
if (content!=null && content.lists.length>0) {
cs_initListGroup(content,"");
}
}
// ------
</script>
<script type="text/javascript" src="config-1.js">
var disable_empty_list=true;
var onclickaction="goto"
var newwindow=0
addListGroup("chainedmenu", "First-Select");
addOption("First-Select", "Select an item", "", 1); //HEADER OPTION
addList("First-Select", "Select a letter", "", "Webmaster");
addOption("Webmaster", "Select First Letter", "", 1); //HEADER OPTION
addList("Webmaster", "A", "", "A Letter");
addList("Webmaster", "B", "", "B Letter");
addList("Webmaster", "C", "", "C Letter");
addList("Webmaster", "D", "", "D Letter");
addList("Webmaster", "E", "", "E Letter");
addOption("A Letter", "Select Option", "", 1); //HEADER OPTION
addOption("A Letter", "A1", "http://www.Google.co.uk");
addOption("B Letter", "Select Secondary B Letter", "", 1); //HEADER OPTION
addOption("B Letter", "B1", "http://www.Google.co.uk");
addOption("C Letter", "Select Secondary C Letter", "", 1); //HEADER OPTION
addOption("C Letter", "C1", "http://www.Google.co.uk");
addOption("D Letter", "Select Secondary D letter", "", 1); //HEADER OPTION
addOption("D Letter", "D1", "http://www.Google.co.uk");
addOption("E Letter", "Select Secondary E letter", "", 1); //HEADER OPTION
addOption("E Letter", "E1", "http://www.Google.co.uk");
</script>
</head>
<body onload="initListGroup('chainedmenu', document.listmenu0.firstlevel, document.listmenu0.secondlevel, document.listmenu0.thirdlevel, 'saveit')">
<table align="center" cellpadding="0" cellspacing="0" border="0" width="90%"><tr><td>
<form name="listmenu0">
<table align="center"><tr>
<td><select name="firstlevel" style="width:200px;"></select></td>
<td><select name="secondlevel" style="width:200px;"></select></td>
<td><select name="thirdlevel" style="width:200px;"></select></td>
<td><input type="button" value="Go" onclick="goListGroup(document.listmenu0.firstlevel, document.listmenu0.secondlevel, document.listmenu0.thirdlevel)">
<input type="button" value="Reset" onclick="resetListGroup('chainedmenu')"> </td>
</tr></table>
</form>
</td></tr></table>
</body>
</html>
Xin yang- Chain Select menu
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Originally Posted by ajfmrf
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