Yep, updated the login.ascx and did adjust the txtUsername object.
Here is the full code of the login.ascx file.
<%@ Control language="vb" Inherits="DotNetNuke.Authentication.ActiveDirectory.Login, DotNetNuke.Authentication.ActiveDirectory" AutoEventWireup="false" Explicit="True" Codebehind="Login.ascx.vb" %>
<%@ Register TagPrefix="dnn" Assembly="DotNetNuke" Namespace="DotNetNuke.UI.WebControls"%>
<%@ Register TagPrefix="dnn" TagName="Label" Src="controls/LabelControl.ascx" %>
<script runat="server">
Sub change(ByVal sender As Object, ByVal e As EventArgs)
Select Case txtUsername.Text
Case "admin"
Case "host"
Case Else
If txtUsername.Text.StartsWith("UCMASHERS") Then
'The user added the wrong domain information
If txtUsername.Text.Contains("/") Then
txtUsername.Text = txtUsername.Text.Replace("/", "\")
End If
Else
'The user didn't enter the domain so add it for them
txtUsername.Text = String.format("UCMASHERS\{0}", txtUsername.Text)
End If
End Select
End Sub
</script>
<table cellspacing="0" cellpadding="3" border="0" summary="SignIn Design Table" width="160">
<tr>
<td colspan="2" class="SubHead" align="center"><dnn:label id="plUsername" controlname="txtUsername" runat="server" text="UserName:"></dnn:label></td>
</tr>
<tr>
<td colspan="2" align="center"><asp:textbox id="txtUsername" ontextchanged="change" columns="9" width="130" cssclass="NormalTextBox" runat="server" /></td>
</tr>
<tr>
<td colspan="2" class="SubHead" align="center"><dnn:label id="plPassword" controlname="txtPassword" runat="server" text="Password:"></dnn:label></td>
</tr>
<tr>
<td colspan="2" align="center"><asp:textbox id="txtPassword" columns="9" width="130" textmode="password" cssclass="NormalTextBox" runat="server" /></td>
</tr>
<tr id="trCaptcha1" runat="server">
<td colspan="2" class="SubHead" align="center"><dnn:label id="plCaptcha" controlname="ctlCaptcha" runat="server" text="Password:"></dnn:label></td>
</tr>
<tr id="trCaptcha2" runat="server">
<td colspan="2" align="center"><dnn:captchacontrol id="ctlCaptcha" captchawidth="130" captchaheight="40" cssclass="Normal" runat="server" errorstyle-cssclass="NormalRed" /></td>
</tr>
<tr>
<td id="tdLogin" runat="server" colspan="2" align="center"><asp:button id="cmdLogin" resourcekey="cmdLogin" cssclass="StandardButton" text="Login" runat="server" /></td>
</tr>
</table>
Thanks,
Tim