Hi, I'm developing a custom module using ajax toolkit extension.
I've used some ValidatorCalloutExtender, and all work fine before starting validation. After the validation is started (with the warnings validators popups) if I do some postback, I receive an error on IE browser and the page is no refreshed with the postback changement.
Below you can see the error reported on my browser:

Error Details Web page

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; SLCC1;. NET CLR 2.0.50727; MDDR;. NET CLR 3.5.30729;. NET CLR 3.0.30729)
Timestamp: Tue, 11 May 2010 07:42:07 UTC


Message: 'originalWidth' is null or not an object
Line: 50
Char: 1
Code: 0
URI: http://localhost/dotnetnuke/ScriptRes...

Any Idea to solve!? I don't know where to find to solve it!
ThankYou!

You can try this bug using next code for your testing custom module:

---

View.ascx

<%@ Control Language="vb" AutoEventWireup="false" CodeBehind="View.ascx.vb" Inherits="Registrazione.View" %>

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>

  

      

  

        <table>

            <tr>

                <td>Name:</td>

                <td>

                    <asp:TextBox runat="server" ID="NameTextBox" BorderStyle="solid" BorderWidth="1px" BorderColor="#a9a9a9" />

                </td>

            </tr>

            <tr>

                <td>Phone Number:</td>

                <td>

                    <asp:TextBox runat="server" ID="PhoneNumberTextBox" BorderStyle="solid" BorderWidth="1px" BorderColor="#a9a9a9" />

                </td>

            </tr>

        </table>

        <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" 

            Width="150px">

            <asp:ListItem>America</asp:ListItem>

            <asp:ListItem>Asia</asp:ListItem>

            <asp:ListItem>Europe</asp:ListItem>

        </asp:DropDownList>

        <br />

        <asp:DropDownList ID="DropDownList2" runat="server" Width="150px">

        </asp:DropDownList>

        <br />    

        <asp:RequiredFieldValidator runat="server" ID="NReq"

            ControlToValidate="NameTextBox"

            Display="None"

            ErrorMessage="<b>Required Field Missing</b><br />A name is required." />

        <ajaxToolkit:ValidatorCalloutExtender runat="Server" ID="NReqE"

            TargetControlID="NReq"

            HighlightCssClass="validatorCalloutHighlight" />    

                      

        <asp:RequiredFieldValidator runat="server" ID="PNReq"

            ControlToValidate="PhoneNumberTextBox"

            Display="None"

            ErrorMessage="<b>Required Field Missing</b><br />A phone number is required.<div style='margin-top:5px;padding:5px;border:1px solid #e9e9e9;background-color:white;'><b>Other Options:</b><br /><a href=' No phone number available in profile.");'>Extract from Profile</a></div>" />

        <ajaxToolkit:ValidatorCalloutExtender runat="Server" ID="PNReqE"

            TargetControlID="PNReq"

            HighlightCssClass="validatorCalloutHighlight"

            Width="350px" />     

                     

        <asp:RegularExpressionValidator runat="server" ID="PNRegEx"

            ControlToValidate="PhoneNumberTextBox"

            Display="None"

            ValidationExpression="((\(\d{3}\) ?)|(\d{3}-))?\d{3}-\d{4}"

            ErrorMessage="<b>Invalid Field</b><br />Please enter a phone number in the format:<br />(###) ###-####" />

        <ajaxToolkit:ValidatorCalloutExtender runat="Server" ID="PNReqEx"

            TargetControlID="PNRegEx"

            HighlightCssClass="validatorCalloutHighlight" />

               

        <asp:Button ID="Button1" runat="server" Text="Submit" 

    OnClick="Button1_OnClick" Width="61px" />

            <br /><br />

        <asp:UpdatePanel ID="UpdatePanel1" runat="server">

            <ContentTemplate>

                <asp:Label id="lblMessage" runat="server" />

            </ContentTemplate>

            <Triggers>

                <asp:AsyncPostBackTrigger ControlID="Button1" EventName="Click" />

            </Triggers>

        </asp:UpdatePanel>

---

View.ascx.vb

Imports DotNetNuke

Partial Public Class View

    Inherits DotNetNuke.Entities.Modules.PortalModuleBase

    Private Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init

        If Not Page.IsPostBack Then

            If DotNetNuke.Framework.AJAX.IsInstalled Then

                DotNetNuke.Framework.AJAX.RegisterScriptManager()

            End If

        End If

    End Sub

    Protected Sub Button1_OnClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click

    End Sub

    Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) Handles DropDownList1.SelectedIndexChanged

        DropDownList2.Items.Clear()

        Select Case DropDownList1.SelectedValue

            Case "America"

                DropDownList2.Items.Add(New ListItem("Alabama", "Alabama"))

                DropDownList2.Items.Add(New ListItem("Alaska", "Alaska"))

                DropDownList2.Items.Add(New ListItem("Arizona", "Alaska"))

                DropDownList2.Items.Add(New ListItem("Etc.", "Etc."))

            Case "Europe"

                DropDownList2.Items.Add(New ListItem("Austria", "Austria"))

                DropDownList2.Items.Add(New ListItem("Belgium", "Belgium"))

                DropDownList2.Items.Add(New ListItem("Bulgaria", "Bulgaria"))

                DropDownList2.Items.Add(New ListItem("Etc.", "Etc."))

            Case "Asia"

                DropDownList2.Items.Add(New ListItem("Abkhazia", "Abkhazia"))

                DropDownList2.Items.Add(New ListItem("Afghanistan", "Afghanistan"))

                DropDownList2.Items.Add(New ListItem("Akrotiri and Dhekelia", "Akrotiri and Dhekelia"))

                DropDownList2.Items.Add(New ListItem("Etc.", "Etc."))

        End Select

  

        If DropDownList1.SelectedValue = "America" Then

        End If

    End Sub

End Class