okay this goes back to my posts on getting the client variables

After figuring out that this part

ClientAPI.GetCallbackEventReference(Me, "'subscribe'", "successFunc", Me.lbImg.ClientID.ToString, "errorFunc")

requires a reference to the control and not the string name/id of the control it started to work

however I notice that Firefox is now having errors with sending the control info that is referenced  back through the clientcallback  (or something)

here is my code so far (that seems to cause the problem)

ClientAPI.RegisterClientVariable(Me.Page, "ListNumber", "15", False)

ClientAPI.RegisterClientVariable(Me.Page, "LoggedOutRedirect", NavigateURL, False)

Dim MyVariable As System.Web.UI.Control = Me.Page.FindControl(ClientAPI.DNNVARIABLE_CONTROLID)

Me.lbImg.Attributes.Add("onclick", ClientAPI.GetCallbackEventReference(Me, "'subscribe'", "successFunc", Me.lbImg.ClientID.ToString, "errorFunc", MyVariable))

When this runs (the only result sent back is a string and that is used in an alert - nothing else) I get this from the Javascript Console in Firefox

Error: Element.extend is not a function
Source File: http://localhost/dnn_334/js/dnn.js
Line: 909

and my alert never comes up - the RaiseClientAPICallCallbackEvent is never fired

can anybody or Jon confirm this is an error or have I mucked something up?

TIA

sure - at its simplest create a new module

add

Imports DotNetNuke.UI.Utilities

and implement the call back handler

Implements IClientAPICallbackEventHandler

and make sure you reference dotnetnuke.webutility

in the design add an image (not a server control but a regular image and put runat=server on it)

in the page load add this

If ClientAPI.BrowserSupportsFunctionality(ClientAPI.ClientFunctionality.XMLHTTP) AndAlso ClientAPI.BrowserSupportsFunctionality(ClientAPI.ClientFunctionality.XML) Then

ClientAPI.RegisterClientReference(Me.Page, ClientAPI.ClientNamespaceReferences.dnn)

ClientAPI.RegisterClientReference(Me.Page, ClientAPI.ClientNamespaceReferences.dnn_xml)

ClientAPI.RegisterClientReference(Me.Page, ClientAPI.ClientNamespaceReferences.dnn_xmlhttp)

End If

ClientAPI.RegisterClientVariable(Me.Page, "ListNumber", "15", False)

ClientAPI.RegisterClientVariable(Me.Page, "LoggedOutRedirect", NavigateURL, False)

Dim MyVariable As System.Web.UI.Control = Me.Page.FindControl(ClientAPI.DNNVARIABLE_CONTROLID)

Me.lbImg.Attributes.Add("onclick", ClientAPI.GetCallbackEventReference(Me, "'subscribe'", "successFunc", Me.lbImg.ClientID.ToString, "errorFunc", MyVariable))

(replace me.lbimg with your own control name)

in the html view of the design add

<script language="javascript">
<!--
function successFunc(result,ctx)
{
  alert (result);
 }
function errorFunc(result,ctx)
{

 alert ('failure' + result);

}
//-->
   </script>

thien back in the code behind

Public Function RaiseClientAPICallbackEvent(ByVal eventArgument As String) As String Implements DotNetNuke.UI.Utilities.IClientAPICallbackEventHandler.RaiseClientAPICallbackEvent

RETURN "Somestring"

after that build the module and set it up in a portal - now you will see it works in IE and if you open the Javascript console in Firefox that you have problems -

 Is that clear as mud??????????

Your code work fine for me in both FireFox and IE.  I am assuming you have a cached file in FireFox, which is creating your problem.

Regarding your using the MyVaribale as the clientid ref.  Make sure you use the right overload and you are not passing it in as your statusFunc param.  This will Not work

Me.lbImg.Attributes.Add("onclick", ClientAPI.GetCallbackEventReference(Me, "'subscribe'", "successFunc", Me.lbImg.ClientID.ToString, "errorFunc", ClientAPI.DNNVARIABLE_CONTROLID))

This will