<script type="text/javascript" src="${pageContext.request.contextPath }/script/jquery-1.7.1.min.js"></script>
<script type="text/javascript">
$(function(){
$.post("getItemCatList.action",null,function(data){
var str="";
$.each(data,function(index,info){
str+="<option value="+info['id']+">"+info['name']+"</option>";
})
$("#c1").append(str);
})
$("#c1").change(function(){
$("#c2").empty();
$.post("getItemCatList.action",{parentId:$(this).val()},function(data){
var str="";
$.each(data,function(index,info){
str+="<option value="+info['id']+">"+info['name']+"</option>";
})
$("#c2").append(str);
})
})
$("#c2").change(function(){
$("#c3").empty();
$.post("getItemCatList.action",{parentId:$(this).val()},function(data){
var str="";
$.each(data,function(index,info){
str+="<option value="+info['id']+">"+info['name']+"</option>";
})
$("#c3").append(str);
})
})
})
</script>
</HEAD>
<BODY >
一级菜单 <select id="c1">
<option>未选择</option>
</select>
二级菜单 <select id="c2">
<option>未选择</option>
</select>
三级菜单 <select id="c3">
<option>未选择</option>
</select>
<script type="text/javascript">
$(function(){
$.post("getItemCatList.action",null,function(data){
var str="";
$.each(data,function(index,info){
str+="<option value="+info['id']+">"+info['name']+"</option>";
})
$("#c1").append(str);
})
$("#c1").change(function(){
$("#c2").empty();
$.post("getItemCatList.action",{parentId:$(this).val()},function(data){
var str="";
$.each(data,function(index,info){
str+="<option value="+info['id']+">"+info['name']+"</option>";
})
$("#c2").append(str);
})
})
$("#c2").change(function(){
$("#c3").empty();
$.post("getItemCatList.action",{parentId:$(this).val()},function(data){
var str="";
$.each(data,function(index,info){
str+="<option value="+info['id']+">"+info['name']+"</option>";
})
$("#c3").append(str);
})
})
})
</script>
</HEAD>
<BODY >
一级菜单 <select id="c1">
<option>未选择</option>
</select>
二级菜单 <select id="c2">
<option>未选择</option>
</select>
三级菜单 <select id="c3">
<option>未选择</option>
</select>
</BODY>
表
sql语句 select * from item_cat where parentid="0" 这个0是变量,通过前面的ajax传递到后台的.
