gistfile1.js

var InputTitleAsValue = new Attitude.Behavior({
  initialize: function() {
    if (this.element.get('value') == '') {
      this.element.set('value', this.element.get('title'))
    } else if (this.element.get('value') != this.element.get('title')) {
      this.element.removeClass('title-as-value')
    }
  },

  onFocus: function() {
    if (this.element.get('value') == this.element.get('title')) {
      this.element.set('value', '')
      this.element.removeClass('title-as-value')
    }
  },

  onBlur: function() {
    if (this.element.get('value') == '') {
      this.element.set('value', this.element.get('title'))
      this.element.addClass('title-as-value')
    }
  }
})

/**
 * Initialization and binding of unobtrusive behaviors to elements
 */
Attitude.define({
  '.title-as-value': InputTitleAsValue
})