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 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 或者哪位js高手顺手也一个简单的demo最好 这种网上的demo很多了楼主搜一下 <!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 Documentfunction 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++){ document.getElementById(star[i]).onchange=new Function("change("+(i+1)+",star,optstar)"); } change(0,star,optstar); } 帮忙看看js里面的代码意思。。谢谢 表格明细赋值问题 谁帮我写个小循环呀!! 这个该怎么写才能实现 关于正则表达式的问题 关于梅花雪树节点文本换行的问题 MD5可以给数据库加密么? !!很急!!一个输入限制的问题。 用DOM怎样在不同的TABLE之间拷贝/移动行? 如何使用图片实现复选框的全选择? 为什么我的网页中嵌入百度搜索窗口会出现乱码? jquery代码解释其中的title,jump to等
<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++){
document.getElementById(star[i]).onchange=new Function("change("+(i+1)+",star,optstar)");
}
change(0,star,optstar);
}