Uncaught TypeError: Cannot read property 'onsubmit' of null : The Official Microsoft ASP.NET Forums

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kilofafeure

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1507 Points

Uncaught TypeError: Cannot read property 'onsubmit' of null

Jun 15, 2012 12:36 PM|LINK

Hi, I'm implementing a form that after enter 2 or 3 values (values of Session Vars) should load an aspx on the same div. The problem I've is that when tries to load the aspx on the div nothing happens. On Firefox appear the aspx for a second to dissapear and on Chrome the screen appears in blank and when this happens on the tab appears: "Connecting", but nothing happens.

If I use the developer tools of Chrome I can arrive to find this error message:

Uncaught TypeError: Cannot read property 'onsubmit' of null

I've been searching for it but I haven't been able to find why happens. Could someone explain me why appears this message and why I can't see my aspx?

Thanks in advance!

Jquery and CodeBehind of the form to call to the second site, this works fine:

JAVASCRIPT

            $("#btnSubmitLogin").click(function() {
                //var stringError = "";          
                $.ajax({
                    type: "POST",
                    contentType: "application/json; charset=utf-8",
                    url: "LoginRegletaWeb.aspx/CrearVarsSession",
                    data: "{ LOGINCTI: '" + $("#tbLogin").val() + "', EXTENSIONCTI: '" + $("#tbExtension").val() + "', TELFREMOTOCTI: '" + $("#tbTelf").val() + "'}",
                    dataType: "json",
                    success: function(data) {
                        if (data.d == "1") {
                            alert("Debes introducir el login y la extensión.");
                        }
                        else if ((data.d == "RegletaWeb.aspx")||(data.d == "RegletaWebRemoto.aspx")) {
                            $("#tbLoginRegletaWeb").load(data.d);                           
                        }
                        else {
                            alert("Error: " + data.d);
                        }            
                    },
                    error: function(xhr, textStatus, errorThrown) {
                        alert("textStatus: " + textStatus.toString() + " ErrorThrown: " + errorThrown.toString());
                    }
                });
            });

CODEBEHIND

    <WebMethod()> _
    Public Shared Function CrearVarsSession(ByVal LOGINCTI As String, ByVal EXTENSIONCTI As String, ByVal TELFREMOTOCTI As String) As String
        Dim devolver As String = ""
        Try
            If Trim(LOGINCTI) <> "" And Trim(EXTENSIONCTI) <> "" Then
                HttpContext.Current.Session("MST_LOGINCTI") = LOGINCTI
                HttpContext.Current.Session("MST_EXTENSIONCTI") = EXTENSIONCTI
                devolver = "RegletaWeb.aspx"
            Else
                Return "1"
            End If
            If Trim(TELFREMOTOCTI) <> "" Then
                HttpContext.Current.Session("MST_TELFREMOTOCTI") = TELFREMOTOCTI
                'devolver = "RegletaWebRemoto.aspx"
            End If
            Return devolver
        Catch ex As Exception
            Return ex.ToString()
        End Try
    End Function

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