Functions for display of images in a window. Supported image formats include GIF, JPEG, PNG and FITS, which may be compressed. The SoG program (http://www.starlink.ac.uk/sog/) will be used if it is available, otherwise a no-frills image viewer will be used instead.
displayImage( label, location )
label
(String): identifies the window in which the imag will be
displayedlocation
(String): image location - may be a filename or URL