用jsp写保存按钮

dockedItems: [{
        xtype: 'toolbar',
        items: {
            text: '保存',
            icon: '${ctx}/img/save.gif',
            handler: function(){

                var leftRecord = leftTree.getSelectionModel().getLastSelected(),
                    leftId = leftRecord.raw.id;

                var records = centertree.getView().getChecked(),
                    ids =[];

                Ext.Array.each(records, function(rec){
                    ids.push(rec.get('id'));
                });
                Ext.getBody().mask("正在提交操作...","x-mask-loading");

                MT.Util.request({
                    url:'${ctx}/relation.do?method=saveDwFssr',
                    params:{
                        unitId : leftId,
                        ids : ids.join(",")
                    },
                    async:true,
                    callback:function(response,request){
                        var responseText = response.responseText ;
                        if(responseText == "ok") {
                            Ext.getBody().unmask();
                            Ext.Msg.alert('提示',"保存成功!");
                        }else {
                            alert("后台发生异常,保存失败,请联系管理员!")
                        }
                    }
                }) ;

            }
        }
    }]
});