gistfile1.js

  positionView: function() {
    console.log('positioning');

    // TODO: Fix this nonsense.
    // Check for the existence of this.element because when the transition
    // value initially changes, the element doesn't actually exist!
    if (this.get('element')) {
    this.get('element').style.webkitTransform =
        'translate(0, ' + this.get('transition') + 'px)';
    }
  }.observes('transition')