Commented Issue: The tab container ondemand doesn't play nice with the AutoCompleteExtender. [27389]

The tab container ondemand doesn't play nice with the AutoCompleteExtender.

Somehow the tab renders before the javascript can. Leaving the autocompleteextender useless on the page.

```

<asp:TabContainer ID="TabContainer1" runat="server" Width="950px" OnDemand="true">
<asp:TabPanel ID="TabPanel2" runat="server" ToolTip="" HeaderText="Search" OnDemandMode="Once">
<ContentTemplate>
<script type="text/javascript">
function item_selected_Permissions(sender, e) {
var HiddenFieldUserPerms = $get('<%= HiddenFieldUserPerms.ClientID %>');
HiddenFieldUserPerms.value = e.get_value();
}
</script>
<asp:TextBox ID="txtUserName" runat="server" Width="350"></asp:TextBox>
<asp:AutoCompleteExtender ID="txtUserName_AutoCompleteExtender" runat="server" CompletionInterval="10" DelimiterCharacters="" Enabled="True" MinimumPrefixLength="1" ServiceMethod="GetUsers" ServicePath="~/MyWebservice.asmx" TargetControlID="txtUserName" FirstRowSelected="True" OnClientItemSelected="item_selected_Permissions" CompletionSetCount="20" UseContextKey="True">
</asp:AutoCompleteExtender>
<asp:HiddenField ID="HiddenFieldUserPerms" runat="server" />
<asp:Label ID="lblinvaliduser" runat="server" ForeColor="Red" Text="Please select a user from the suggestion list"
Visible="false"></asp:Label>
<asp:RequiredFieldValidator ID="RequiredFieldValidatorUserID" runat="server" ControlToValidate="txtUserName"
ErrorMessage="*" ValidationGroup="user"></asp:RequiredFieldValidator>
</ContentTemplate>
</asp:TabPanel>
</asp:TabContainer>
```
Comments: Hi! Thank you for sharing your experience. Unfortunately, we can't reproduce the issue you described. The AutoCompleteExtender works perfectly with the Tab control. Check out the screencast showing how it works with the sample project: http://screencast.com/t/gWXqo9qt4fw Feel free to contact me if you have further questions. Best regards, Fadil