gistfile1.scala

    def bid(xhtml: NodeSeq): NodeSeq = {
      var amountBox: Box[String] = Empty
      def submit = {
        for(as <- amountBox ?~ "Amount not entered";
            amount <- tryo(BigDecimal(as).longValue) ?~! "Amount not a number"
        ) yield {
          new Bid().auction(auction).customer(Customer.currentUser).amount(amount).save
        }
      } match {
        case Full(x) => S.notice("Great, your bid was accepted!")
        case Failure(msg, _, _) => S.error(msg)
        case _ => S.warning("Unable to place bid at this time.") 
      }
      SHtml.ajaxForm(bind("b",xhtml,
        "amount" -%> SHtml.text(amountBox.openOr(""), s => amountBox = Full(s)) % ("id" -> "amount"),
        "submit" -> SHtml.ajaxSubmit("Place Bid", () => { submit; Noop })
      ))
    }