ajax请求后台得到json数据后动态生成树形下拉框的方法

<select id="cc" class="easyui-combotree" style="width:580px;" name="rempId" data-options="required:true"></select>

<script>

$(function(){
$.ajax({
url:"departmentAction_getAllDep.action",
type:"post",
success:function(result){
//console.log(result);
$("#cc").combotree('loadData',b1(result));
}
});
$("#cc").combotree({
animate:true,
//选择树节点触发事件 
 onSelect : function(node) { 
 n = node;
  //返回树对象 
  var tree = $(this).tree; 
  //选中的节点是否为叶子节点,如果不是叶子节点,清除选中 
  var isLeaf = tree('isLeaf', node.target); 
  if (!isLeaf) { 
   //清除选中 
   $("#cc").combotree('clear'); 
  } 
 } 
});
});

var tree = {
id:'', 
 text:'', 
 state:'', 
 checked:'', 
 iconCls:'',
 attributes:'', 
 children:''
}

function b1(result){
var t = [];
$.each(result,function(index,dept){
t[index] = b2(dept);
});
return t;
}

function b2(dept){
  var tree = new Object();
tree.id = dept.depId; 
 tree.text = dept.depName; 
 tree.state = 'closed'; 
 tree.checked = 'false';
 if(dept.employees.length != 0){
 tree.children = b3(dept.employees);
 }else{
 tree.children = [];
 }
 return tree;
}

function b3(employees){ 
 var easyTree = []; 
 $.each(employees,function(index,item){ 
 easyTree[index] = b4(item); 
 }); 
 return easyTree; 
} 
 
function b4(item){
var tree = new Object();
tree.id = item.empId;
tree.text = item.empName;
if(item.empSex == "男"){
tree.iconCls = 'icon-nan';
}else{
tree.iconCls = 'icon-female';
}
return tree;
} 

</script>

<action name="departmentAction_*" class="com.chinasoft.action.DepartmentAction" method="{1}">
<result name="getAllDep" type="json">
<param name="root">list</param>
</result>
</action>