http://www.kriyayoga.com/love_blog/post.php/853 http://www.webmotionuk.co.uk/php-jquery-image-upload-and-crop-v11/ http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=10377&p=32751&hilit=+divide+image http://coding.smashingmagazine.com/2011/04/05/image-manipulation-with-jquer