In DNN, I use ASP.NET AJAX in my module, and in my code I need to use Javascript to call the asp.net method.
So, my code will like:
1. in page_load:
If DotNetNuke.Framework.AJAX.IsInstalled Then
        DotNetNuke.Framework.AJAX.RegisterScriptManager()
        DotNetNuke.Framework.AJAX.SetScriptManagerProperty(Me.Page, "EnablePageMethods", New Object() {True})
End If
2. the asp.net method will be call:
<System.Web.Services.WebMethod()> Public Shared Function Test(ByVal moduleId As Integer, ByVal myValue As Integer) As String
      ...
            Return ""
        End Function
3. the javascript code:
function myTest(moduleId, myValue)
 {
     PageMethods.Test(moduleId, myValue, callback_myTest);
 }

QUESTION: When i call myTest javascript function, i get the error: 'PageMethods' is undefined. How should I resolve this issue?