JS多级连动菜单

JS联动下拉框

/*
** ==================================================================================================
** 类名：CLASS_LIANDONG_YAO
** 功能：多级连动菜单
**
** 作者：YAODAYIZI

** ==================================================================================================
**/
function CLASS_LIANDONG_YAO(array)
{
//数组，联动的数据源
this.array=array;
this.indexName='';
this.obj='';
//设置子SELECT
// 参数：当前onchange的SELECT ID，要设置的SELECT ID
this.subSelectChange=function(selectName1,selectName2)
{
//try
//{
var obj1=document.all[selectName1];
var obj2=document.all[selectName2];
var objName=this.toString();
var me=this;

obj1.onchange=function()
{

me.optionChange(this.options[this.selectedIndex].value,obj2.id)
}

}
//设置第一个SELECT
// 参数：indexName指选中项,selectName指select的ID
this.firstSelectChange=function(indexName,selectName)
{
this.obj=document.all[selectName];
this.indexName=indexName;
this.optionChange(this.indexName,this.obj.id)

}

// indexName指选中项,selectName指select的ID
this.optionChange=function (indexName,selectName)
{
var obj1=document.all[selectName];
var me=this;
obj1.length=0;
obj1.options[0]=new Option("请选择",'');
for(var i=0;i

//例子1-------------------------------------------------------------
//数据源
var array=new Array();
array[0]=new Array("华南地区","根目录","华南地区"); //数据格式 ID，父级ID，名称
array[1]=new Array("华北地区","根目录","华北地区");
array[2]=new Array("上海","华南地区","上海");
array[3]=new Array("广东","华南地区","广东");
array[4]=new Array("徐家汇","上海","徐家汇");
array[5]=new Array("普托","上海","普托");
array[6]=new Array("广州","广东","广州");
array[7]=new Array("湛江","广东","湛江");
//--------------------------------------------
//这是调用代码
var liandong=new CLASS_LIANDONG_YAO(array) //设置数据源
liandong.firstSelectChange("根目录","s1"); //设置第一个选择框
liandong.subSelectChange("s1","s2"); //设置子级选择框
liandong.subSelectChange("s2","s3");

//例子2-------------------------------------------------------------
//数据源
var array2=new Array();//数据格式 ID，父级ID，名称
array2[0]=new Array("测试测试","根目录","测试测试");
array2[1]=new Array("华北地区","根目录","华北地区");
array2[2]=new Array("上海","测试测试","上海");
array2[3]=new Array("广东","测试测试","广东");
array2[4]=new Array("徐家汇","上海","徐家汇");
array2[5]=new Array("普托","上海","普托");
array2[6]=new Array("广州","广东","广州");
array2[7]=new Array("湛江","广东","湛江");
array2[8]=new Array("不知道","湛江","不知道");
array2[9]=new Array("5555","湛江","555");
array2[10]=new Array("++++","不知道","++++");
array2[11]=new Array("111","徐家汇","111");
array2[12]=new Array("222","111","222");
array2[13]=new Array("333","222","333");
//--------------------------------------------
//这是调用代码
//设置数据源
var liandong2=new CLASS_LIANDONG_YAO(array2);
//设置第一个选择框
liandong2.firstSelectChange("根目录","x1");
//设置子选择框
liandong2.subSelectChange("x1","x2")
liandong2.subSelectChange("x2","x3")
liandong2.subSelectChange("x3","x4")
liandong2.subSelectChange("x4","x5")

[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]