三级联动菜单失效

Question

你的两个下拉框的ID重复了。。都是s1,s2,s3,改一下再看。

Answer 1

代码是：
<script language="javascript" src="inc/city.js"></script>
<SCRIPT LANGUAGE = JavaScript>
var s=["s1","s2","s3"];
var opt0=["省份","地级市","市、县级市、县"];
function setup(){
   for(i=0;i<s.length-1;i++){
       document.getElementById(s[i]).onchange=new Function("change("+(i+1)+")");}
   change(0);}
</SCRIPT>第一组：
<select id="s1">
                      <option>省份</option>
                    </select>
                      <select id="s2">
                        <option>地级市</option>
                      </select>
                      <select id="s3">
                        <option>市、县级市、县</option>
                      </select>第二组：<select id="s4">
                      <option>省份</option>
                    </select>
                      <select id="s5">
                        <option>地级市</option>
                      </select>
                      <select id="s6">
                        <option>市、县级市、县</option>
                      </select>

Answer 2

city.js也要改动一下
-----------------------------
在var dsy=new Dsy();之上加入如下代码:
function change1(v)
{
   var str="0";
   for(i=0;i<v;i++){
       str+=("_"+(document.getElementById(d[i]).selectedIndex-1));};
   var dd=document.getElementById(d[v]);
   with(dd){
       length=0;
       options[0]=new Option(opt0[v],opt0[v]);
       if(v&&document.getElementById(d[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<d.length){
           change(v);}}
}