private void AddAsirraValidation()
{
if (IsPostBack && !Asirra.ValidateAsirraChallenge(Request["Asirra_Ticket"]))
{
// If the Asirra ticket is not valid, stop the submission.
Response.Redirect(Request.RawUrl);
}
var submitButton = (Button)ContactForm.FindControl("FormView").FindControl("SubmitButton");
submitButton.OnClientClick = string.Format(@"if (!validateAsirraChallenge(""{0}"")) return false;", submitButton.ClientID);
}