sp.printHTMLheader("RUBiS ERROR: Register user");
sp.printHTMLheader("RUBiS ERROR: Register Item");
  private void printError(String errorMsg, ServletPrinter sp)  {    sp.printHTMLheader("RUBiS ERROR: Register user");    sp.printHTML(      "<h2>Your registration has not been processed due to the following error :</h2><br>");    sp.printHTML(errorMsg);    sp.printHTMLfooter();      }