ext tree节点要排序该怎么处理

ext tree节点要排序该怎么办？
我实现树的代码：
Ext.BLANK_IMAGE_URL
Ext.BLANK_IMAGE_URL='public/ext-2.0.2/s2.gif';
var tree;
  var Tree = Ext.tree;
  var xt = Ext.tree;
  var n;
  var tree;
var TreeTest = function(){
    // shorthand
 
   
    return {
        init : function(){
               var hidfzid  = document.getElementById("hidfzid").value;    
               tree = new Tree.TreePanel({
                el:'classes',
                animate:true,
                autoScroll:true,     
                loader: new Tree.TreeLoader({dataUrl:'reportfzxxAction.do?method=geturl&fzid='+hidfzid}),
                enableDD:true,
                containerScroll: true,
                dropConfig: {appendOnly:true}
            });
           
           
            new Tree.TreeSorter(tree, {folderSort:true});
            var root = new Tree.AsyncTreeNode({
                text: '分组分类',
                draggable:false, // disable root node dragging
                id:'source'
            });

            tree.setRootNode(root);
            tree.render();
            root.expand();     
            tree.on('click', function(node){
//根据fbid得到项目数据 添加到中间的表格中
document.getElementById("hidfzxxid").value=node.id;
document.getElementById("hidccjb").value=node.attributes.ccjb;
    parent.query.list.location.href="reportfzxxAction.do?method=getflbyid&id="+node.id+"&fzid="+node.attributes.fzid+"&ccjb="+node.attributes.ccjb;//层次级别
});
        }
    };
}();



现在的问题是：不管我的数据是[{'text' : '辅助生产成本','id' : '8afc92b6197fecf70119837022bb0005'},{'text' : '基本生产成本','id' : '8afc92b6197fecf70119839285480008'}]还是
[{'text' : '基本生产成本','id' : '8afc92b6197fecf70119837022bb0005'},{'text' : '辅助生产成本','id' : '8afc92b6197fecf70119839285480008'}]
在页面显示时总是基本生产现在在前面！ 谁可以解决这个问题啊？