gistfile1.scala

    def bid(xhtml: NodeSeq): NodeSeq = {
      var amountBox: Box[String] = Empty
      def submit = {
        for(ass <- amountBox ?~ "Amount not entered";
            amo <- tryo(BigDecimal(ass).doubleValue) ?~! "Amount not a number";
            auc <- auction;
            vld <- tryo(amo).filter(_ >= auc.nextAmount) ?~ "Less that required amount!"
        ) yield {
          new Bid().auction(auction).customer(Customer.currentUser).amount(amo).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.") 
      }
      if(Customer.loggedIn_?){
        SHtml.ajaxForm(bind("b",xhtml,
          "amount" -%> SHtml.text(amountBox.openOr(""), s => amountBox = Full(s)) % ("id" -> "amount"),
          "submit" -> SHtml.ajaxSubmit("Place Bid", () => { submit; Noop })
        ))
      } else {
        S.warning("You must be logged in to bid on auctions.")
        NodeSeq.Empty
      } 
    }