三级联动
日期：2014-05-16 浏览次数：20377 次
求一个三级联动
求一个三级联动，是通过数据库进行联动的。
------解决方案--------------------
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<script src="area.js" type="text/javascript"></script>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title> 信息发布</title>
</head>
<body onLoad="setup();">
<div style="width:980px; height:100%; margin:0 auto;">
<div class="chotitle">
<form id="senttype" name="formsent" method="post" style="margin:0;padding-top:15px">
<table width="100%" border="0" cellspacing="0" cellpadding="7">
<tr>
<td width="13%">起 点:</td>
<td width="44%">
<SELECT id="star_province" NAME="star_province"><option>省份</option></SELECT>
<SELECT id="star_city" NAME="star_city"><option>地级市</option></SELECT>
<SELECT id="star_county" NAME="star_county"><option>市、县级市、县</option>
</SELECT>
</td>
</tr>
</table>
</form>
</div>
</div>
</body>
</html>
js文件如下：
// JavaScript Document
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,obj,init){
var str="0";
for(i=0;i<v;i++)
{ str+=("_"+(document.getElementById(obj[i]).selectedIndex-1));}; //属性可设置或返回下拉列表中被选选项的索引号,若有多个选择，则返回第一个
var ss=document.getElementById(obj[v]);
with(ss){
length = 0;
options[0]=new Option(init[v],init[v]);
if(v && document.getElementById(obj[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<star.length)
{change(v,obj,init);}
}
}
var dsy = new Dsy();
dsy.add("0",["安徽","河南"]);
dsy.add("0_0",["安庆","蚌埠","巢湖"]);
dsy.add("0_0_0",["安庆市","怀宁县","潜山县","宿松县","太湖县","桐城市","望江县","岳西县","枞阳县"]);
dsy.add("0_0_1",["蚌埠市","固镇县","怀远县","五河县"]);
dsy.add("0_0_2",["巢湖市","含山县","和县","庐江县","无为县"]);
dsy.add("0_1",["郑州","南阳","安阳"]);
dsy.add("0_1_0",["郑郑","郑州县"]);
dsy.add("0_1_1",["宛城区","卧龙区","西峡","南召"]);
dsy.add("0_1_2",["安阳县","安阳区"]);
var star=["star_province","star_city","star_county"];
var optstar = ["省份","地级市","市、县级市、县"];
function setup()
{
for(i=0;i<star.length-1;i++){
求一个三级联动，是通过数据库进行联动的。
------解决方案--------------------
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<script src="area.js" type="text/javascript"></script>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title> 信息发布</title>
</head>
<body onLoad="setup();">
<div style="width:980px; height:100%; margin:0 auto;">
<div class="chotitle">
<form id="senttype" name="formsent" method="post" style="margin:0;padding-top:15px">
<table width="100%" border="0" cellspacing="0" cellpadding="7">
<tr>
<td width="13%">起 点:</td>
<td width="44%">
<SELECT id="star_province" NAME="star_province"><option>省份</option></SELECT>
<SELECT id="star_city" NAME="star_city"><option>地级市</option></SELECT>
<SELECT id="star_county" NAME="star_county"><option>市、县级市、县</option>
</SELECT>
</td>
</tr>
</table>
</form>
</div>
</div>
</body>
</html>
js文件如下：
// JavaScript Document
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,obj,init){
var str="0";
for(i=0;i<v;i++)
{ str+=("_"+(document.getElementById(obj[i]).selectedIndex-1));}; //属性可设置或返回下拉列表中被选选项的索引号,若有多个选择，则返回第一个
var ss=document.getElementById(obj[v]);
with(ss){
length = 0;
options[0]=new Option(init[v],init[v]);
if(v && document.getElementById(obj[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<star.length)
{change(v,obj,init);}
}
}
var dsy = new Dsy();
dsy.add("0",["安徽","河南"]);
dsy.add("0_0",["安庆","蚌埠","巢湖"]);
dsy.add("0_0_0",["安庆市","怀宁县","潜山县","宿松县","太湖县","桐城市","望江县","岳西县","枞阳县"]);
dsy.add("0_0_1",["蚌埠市","固镇县","怀远县","五河县"]);
dsy.add("0_0_2",["巢湖市","含山县","和县","庐江县","无为县"]);
dsy.add("0_1",["郑州","南阳","安阳"]);
dsy.add("0_1_0",["郑郑","郑州县"]);
dsy.add("0_1_1",["宛城区","卧龙区","西峡","南召"]);
dsy.add("0_1_2",["安阳县","安阳区"]);
var star=["star_province","star_city","star_county"];
var optstar = ["省份","地级市","市、县级市、县"];
function setup()
{
for(i=0;i<star.length-1;i++){
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