Impress your friends with fake ad-sense earnings

Using document.designMode and the printscreen button. Of course, you could just use Firebug, jash or, if you're just doing screenshots, Photoshop.

You could also import a library like Prototype (read the jash bookmarklet url to see how that is done) and write something like javascript:new Ajax.Updater(document.body, "myspoofingpage.html"); on the address bar.

document.designMode is what most web based WYSIWYG editors use to provide editability, except that editors usually enable it in an iframe rather than the actual main page. The advantage of using designMode over pure javascript is that the cursor manipulation is native with designMode, hence it's more responsive.

Anyways, the only thing I don't get is: why does anyone ever feel the urge to pretend they are richer than they really are? That's so lame.