Backgroundimage - Changing

i want to change the backgroundimage on my homepage every time you refresh. How can I make that? I think it´s possible with jquery but I don´t know exaktly.

Thank you for any help or commen开发者_如何学Pythont on this subject.

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I don't know "HOW TO", but I have found the following link:

http://www.9lessons.info/2011/03/background-image-change-on-refresh-with.html