在一个GridPanel里面添加一个PagingToolBar作为bbar后，这个Panel就无法显示了，用firebug调试，发现这个代码运行到PagingToolBar的定以后就异常结束了，之后的代码根本不运行的，肿么回事？Ext版本是2.2.1
PagingToolBar的定义如下
[code="javascript"]
var alertStore = new Ext.data.Store({
proxy:new Ext.data.MemoryProxy(),
reader:new Ext.data.JsonReader({id:'rid'},[
{name:'rid'},
{name:'alert_time'},
{name:'alert_type'},
{name:'alert_descr'},
]),
sortInfo:{
field:'alert_time',
direction:'desc'
}
});
var pagingBar = new Ext.PagingToolbar({
pageSize: 25,
store: alertStore ,
displayInfo: true,
displayMsg: 'Displaying topics {0} - {1} of {2}',
emptyMsg: "No topics to display",
});
var wpanel = new Ext.grid.GridPanel({
//...other codes
tbar:tbar,
bbar:pagingBar
});
//然后把wpanel作为一个tabpanel添加进别的容器
//...
[/code]
