小编Dha*_*raj的帖子

在我的aspx页面中:

<script type="text/javascript">
Ext.onReady(function() {
    Ext.get('mb1').on('click', function(e) {
        Ext.MessageBox.confirm('Confirm', 'Are you sure you want to do that?', showResult);
});
function showResult() {
    Ext.example.msg('test');
</script>

<div>
<asp:Button ID="mb1" runat="server" Text="Button" />
</div>

我收到错误消息"ext is undefined".谁能帮我？