Play live with any web page!
Put this in the location bar of your web browser :
javaFOOscript:document.body.contentEditable='true'; document.designMode='on'; void 0
(due to security on my blog, please remove the FOO string)
Now you can tweak and test your design, change text, resize pictures, resize tables, … so it's easy to review your layout live with your customer during a meeting, deface a website you hate or… just having fun!
Go ahead, test this and play with my blog!