text: (function ($) {
    $.fn.spinner = function (opts) {
      return this.each(function () {
        var defaults = {value:1, min:0}
        var options = $.extend(defaults, stepN, opts)
        var keyCodes = {up:38, down:40}
        var container = $('<div></div>')
        container.addClass('spinner')
        var textField = $(this).addClass('value').attr('maxlength', '4').val(options.value)
          .bind('keyup paste change', function (e) {
            var field = $(this)
            if (e.keyCode == keyCodes.up) changeValue(stepN)
            else if (e.keyCode == keyCodes.down) changeValue(-stepN)
            else if (getValue(field) != container.data('lastValidValue')) validateAndTrigger(field)
          })
        textField.wrap(container)
  
        var increaseButton = $('<input type="button" class="increase" value="-">').click(function () { changeValue(stepN) })
        var decreaseButton = $('<input type="button" class="decrease" value="+">').click(function () { changeValue(-stepN) })
  
        validate(textField)
        container.data('lastValidValue', options.value)
        textField.before(decreaseButton)
        textField.after(increaseButton)
  
        function changeValue(delta) {
          textField.val(getValue() + delta)
          validateAndTrigger(textField)
        }
  
        function validateAndTrigger(field) {
          clearTimeout(container.data('timeout'))
          var value = validate(field)
          if (!isInvalid(value)) {
            textField.trigger('update', [field, value])
          }
        }
  
        function validate(field) {
          var value = getValue()
          if (value <= options.min) decreaseButton.attr('disabled', 'disabled')
          else decreaseButton.removeAttr('disabled')
          field.toggleClass('invalid', isInvalid(value)).toggleClass('passive', value === 0)
  
          if (isInvalid(value)) {
            var timeout = setTimeout(function () {
              textField.val(container.data('lastValidValue'))
              validate(field)
            }, 500)
            container.data('timeout', timeout)
          } else {
            container.data('lastValidValue', value)
          }
          return value
        }
  
        function isInvalid(value) { return isNaN(+value) || value < options.min; }
  
        function getValue(field) {
          field = field || textField;
          return parseInt(field.val() || 0, 10)
        }
      })
    }
  })(jQuery)