A new site of mine Storm Trumpets is receiving some attention for the expanding / collapsing site menu. Visit the site and click on the menu items “Trumpets” and “Trombones” to see the menu in action. It creates the illusion of movement as if driven by DHTML or JavaScript, however to the contrary it works in CSS and is really quite simple. I have been asked to explain how it works, so thought I would provide a brief tutorial for it here.
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