How to save a site's background as a picture?

Question

I saw one question and one answerer called 'vegas_guy' answered the best and he actually gave a link to the original picture in the backgorund of a site itself.

The question was this one:http://answers.yahoo.com/question/index;_ylt=AnXUaAMhuXS5JezQ25BhoBHsy6IX;_ylv=3?qid=20080819191305AAayEB6

And this was the site where the background picture of the Joker is:http://avatars.imvu.com/Guest_CookiMunster

If you check out the link given by the best answerer, he gave the link to the picture that he'd obviously uploaded here:http://img153.imageshack.us/my.php?image=jokerhf9.jpg

What I want to ask is how did he do it? How did he get this picture off the site and saved it?

Please try and give clear answers so that I can understand. Thank you for reading my question.

Answer 1

Right click the image, click view background image, right-click save-as.