var ad_store = new Ext.data.JsonStore({

            fields: ["id", "title1", "title2", "content", "pid", "position", "publish_time", "end_time", "pic_url", "link_url","ad_tag", "total_read_num"],

            url: 'php/action/ad_oper.php?op=query_all&start=0&limit=15&type=' + type,

            totalProperty: 'total',

            root: 'data'

        });

tbar: [{

                text: '增加',

                handler: addAd

            }, {

                text: '筛选游戏:',

                border: false

            }, {

                id: 'select_game',

                xtype: "combo",

                hideLabel: true,

                mode: "local", //由于数据已定义所以必须写成local

                triggerAction: 'all', //想要加载所有项就要这么写，网上这么说的，我没试过不写

                editable: true,

                emptyText: "请选择",

                store: game_info_store,

                valueField: 'gid',

                displayField: 'nameCN', //不写这项的话，你会发现下拉项是空的没内容哦

                listeners: {

                    'select': function(src, val) {

                        gid = val.data.gid;

                        url = 'php/action/ad_oper.php?op=query_all&start=0&limit=15&gid='+gid+'&type=' + type;

                        ad_store.proxy = new Ext.data.HttpProxy({url:url});

                        ad_store.reload();

                    }

                }

            }],