void RaisePostBackEvent (string eventArgument)
{
#if NET_2_0
ValidateEvent (UniqueID, String.Empty);
#endif
if (CausesValidation)
#if NET_2_0
Page.Validate (ValidationGroup);
#else
Page.Validate ();
#endif
OnClick (new ImageClickEventArgs (pos_x, pos_y));
OnCommand (new CommandEventArgs (CommandName, CommandArgument));
}