<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">
<html xmlns="">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Selects</title>
<style type="text/css">
*{font-size:14px;}
select{height:20px;font-size:12px;}
</style>
</head>
<body >
<div>2级联动</div>
<div></div><br><br><br>
<div>3级联动</div>
<div></div><br><br><br>
<div>4级联动</div>
<div></div><br><br><br>
<div>5级联动</div>
<div></div><br><br><br>
<script language="javascript">
var Sys = (function(ua){
var s = {};
s.IE = ua.match(/msie ([\d.]+)/)?true:false;
s.Firefox = ua.match(/firefox\/([\d.]+)/)?true:false;
s.Chrome = ua.match(/chrome\/([\d.]+)/)?true:false;
s.IE6 = (s.IE&&([/MSIE (\d)\.0/i.exec(navigator.userAgent)][0][1] == 6))?true:false;
s.IE7 = (s.IE&&([/MSIE (\d)\.0/i.exec(navigator.userAgent)][0][1] == 7))?true:false;
s.IE8 = (s.IE&&([/MSIE (\d)\.0/i.exec(navigator.userAgent)][0][1] == 8))?true:false;
return s;
})(navigator.userAgent.toLowerCase());
Sys.IE6&&document.execCommand("BackgroundImageCache", false, true);
function $(Id){
return document.getElementById(Id);
};
function $$(p,e){
return p.getElementsByTagName(e);
};
function addListener(element,e,fn){
element.addEventListener?element.addEventListener(e,fn,false):element.attachEvent("on" + e,fn);
};
function removeListener(element,e,fn){
element.removeEventListener?element.removeEventListener(e,fn,false):element.detachEvent("on" + e,fn);
};
var Bind = function(object, fun) {
var args = Array.prototype.slice.call(arguments).slice(2);
return function() {
return fun.apply(object, args);
};
};
var BindAsEventListener = function(object, fun) {
var args = Array.prototype.slice.call(arguments).slice(2);
return function(event) {
return fun.apply(object, [event || window.event].concat(args));
};
};
var Extend = function(destination, source){
for (var property in source) {
destination[property] = source[property];
};
};
var Class = function(properties){
var _class = function(){return (arguments[0] !== null && this.initialize && typeof(this.initialize) == 'function') ? this.initialize.apply(this, arguments) : this;};
_class.prototype = properties;
return _class;
};
//==========================================================================================================================
var Selects = new Class({
initialize :function(container,data,title){
this.container = container;
this.num = title.length;
this.Events = new Array(title.length-1);
var i,l,select;
for(i=0; i<this.num ; i++)
{
container.innerHTML = container.innerHTML + " " + title[i];
container.appendChild(document.createElement('select'));
}
select = $$(container,'select')[0];
for(i=0,l=data.length;i<l;i++)
select.options.add(new Option(data[i].txt,i));
addListener(select,'change',Bind(this,this.Change,select,data,0));
this.Change(select,data,0);
},
Change : function(obj,data,num){
if(num == this.num-1)return;
var menu = data[obj.value].menu;
select = $$(this.container,'select')[num+1];
select.length = 0;
if(!menu)return;
if(this.Events[num]!=undefined)removeListener(select,'change',this.Events[num])
this.Events[num] = Bind(this,this.Change,select,menu,num+1)
addListener(select,'change',this.Events[num]);
for(var i=0,l=menu.length;i<l;i++)
select.options.add(new Option(menu[i].txt,i));
this.Change(select,menu,num+1);
}
});