javascript - Rotate objects around a point -

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i'm working on 3d "cloud" consists of div elements. these div elements should rotate around point. works charme on x-axis can't working on y-axis too. i've put important things jsfiddle project:

http://jsfiddle.net/lggdq/19/

if click , move mouse, items rotating. how can work on y-axis (the items moving not want them do)? items should rotate on x-axis.

thanks in advance


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