If you can get the image on your computer screen, try using Screen dash. You can then capture the image of your screen then edit the photo, save the image, or image host it.
Forget it, I was dumb back then. I just had to upload it,,
unfortunately wiki answers does not let us put any diagrams or images into our answers. So the image is unavailable
http://en.wikipedia.org/wiki/Bliss_(image)
Image here: http://en.wikipedia.org/wiki/Viagra
Putting an image is as simple as putting a text. You just have to put an image tag and its path alongside.
like this
No wiki is not reliable anyone can put in answers soooo wiki sucksssssss
You need to use layers, put one ontop of the other layer with a picture in each one
Crest and trough Image commons.wikimedia.org/wiki/File:Crest_trough.svg
The image must be uploaded beforehand. A free host such as imageshack.org or photobucket.com will usually do.
Right click on the image and click "Save image"