After having someone ask about ways to hide the ImageViewer I decided to added a few new methods. The ImageViewer2 now supports a fadeOut() and fadeIn() method. These animate the _alpha of the ImageViewer container clip. Use fadeOut() to make an ImageViewer fade out to transparent and fade in to make an ImageView fade in to full opacity. If the ImageViewer is faded out calling loadImage() will cause it fade in automatically.
I updated the original post for ImageViewer2.