Image view class is used to display images on top of a web view.
init(x, y, width, height, imageName)
Initializes new NKImageView control with given size, position and image (can be URL to image in the internet)
shows control (not creating)
hides control (not destroying)
sets new image to be displayed, can be either name of the bundled image or URL to the image in the internet.
From v 1.7 this API is deprecated, use setImageObject instead
sets new image to be displayed, where image is an instance of NKImage class