AJAX 多级联动

<script type="text/javascript">

var urlpath = " ${pageContext.request.contextPath }";
j$(function(){

selectAcquirer();
j$("#acqId").change(function(){
selectAcquirer();
});

j$("#groId").change(function(){
selectGroup();
});

j$("#compId").change(function(){
selectCompany();
});

});


function selectAcquirer(){
var acqId = j$("#acqId").val();
initSelect({"acqId" : acqId},"#groId");
selectGroup();
}
function selectGroup(){
var groId = j$("#groId").val();
initSelect({"groId" : groId},"#compId");
selectCompany();
}
function selectCompany(){
var compId = j$("#compId").val();
initSelect({"compId" : compId},"#storeId");
}


function initSelect(dataText,selectId){
j$.ajax({
url : urlpath+"/user/selectQuery.xlx",
type : "POST",
dataType : "json",
     async : false,
data : dataText,
success : function(data) {
var str = "";
if(data == null || data == ""){
var initStr ="<option value=''></option>";
}else{
for(var i = 0; i < data.length; i++){
var array_element = data[i];  
               str += "<option value='"+array_element.id+"'>"+array_element.name+"</option>";  
}
} 
j$(selectId).html(initStr+str);
},
  error : function(result) {
  alert("连接失败");
}  
});
}

</script>

<div class="field">
<label>AAAAA</label>
<div><sf:select path="acquirer.id" id="acqId" class = "acqId">
            <sf:options items="${acquirers}" itemValue="id" itemLabel="name"/>
        </sf:select>
        </div>

</div>

<div class="field">
<label>BBBB</label>
<div>
        <sf:select path="group.id" id = "groId"/>
        </div>
</div>

<div class="field">
<label>CCCCC</label>
<div><sf:select path="company.id" id = "compId"/></div>
</div>

<div class="field">
<label>DDDD</label>
<div><sf:select path="store.id" id = "storeId"/></div>
</div>