The images display in a pop-up window.
If you are using MS Internet Explorer (MSIE), just move your mouse over the image and you will see one of these:
Simply click on the printer icon
and print the image on your chosen printer.
Other Browsers:
If you don't see File, Print options at the top of the pop-up window, you need to right-mouse on the image, choose Save As and save the image on your hard disk in a folder where you can find it again (such as My Documents). Then use MS Paint, or Windows Image Viewer to view the image, and select File, Print options as usual.
Click on the X at top right to close this pop-up window.