jquery的treetable能刷新吗

添加的数据存储到服务器  刷新时重新从服务器读取数据 

tree=new dhtmlXTreeObject(document.getElementById('tree_box'),"100%","100%",-1);
tree.setImagePath("../js/plug-in/dhtmlTree/imgs/csh_vista/");
//tree.setOnRightClickHandler(viewRight);
tree.attachEvent("onClick",treeClick);

function refresh_tree(){   		//刷新目录树
	
	tree.insertNewChild("-1","0","全部");


	$.ajax({
        type: "get",//使用get方法访问后台
        dataType: "json",//返回json格式的数据
	    url: "../jsonfile/depart_json.php",//要访问的后台地址
	    async:true,
            success: function(msg){//msg为返回的数据，在这里做数据绑定
		    var arr=msg;
		    $.each(arr,function(idx,item){
			    tree.insertNewChild(item.upper_depart_id,item.depart_id,item.Depart_name);
		    });    
	    }
	});
	tree.setItemColor(0,"#ff0000","#fffff");
	tree.setItemColor(998,"#ff0000","#fffff");
	tree.setItemColor(999,"#ff0000","#fffff");
	tree.setItemColor(999,"#ff0000","#fffff");

}