function onBookingQuantityEntered(){
   
      document.getElementById("ctl00_content_left_inner_holder_productdropdown").className = "divhidden";
      document.getElementById("ctl00_content_left_inner_holder_productquantity").className = "";


      var bookingQty = document.getElementById("ctl00_content_left_inner_holder_BookingQty").value;


      if (isempty(bookingQty)) {
          var errorMessage =  "Please Enter a Booking Quantity<br/>";
          document.getElementById("ctl00_content_left_inner_holder_error_message").innerHTML = errorMessage;
      }
      else {
        document.getElementById("ctl00_content_left_inner_holder_error_message").innerHTML = "";
        document.getElementById("ctl00_content_left_inner_holder_productquantity").className = "divhidden";
        document.getElementById("ctl00_content_left_inner_holder_schoolfundraiserdropdown").className = "";
    }
    return false;
  }