Mac OSX is able to display message notifications — still referred to as Growl messages, despite the fact that the big cat moniker is no longer applied to versions. Many applications send Growl messages to the OS to let the user know that an action has just occurred. Wouldn’t it be nice to use messages like this on our websites? I think so. In this tutorial we’ll construct a notification like this with HTML, CSS3 and a little jQuery. Growl message functionality ... When more than one message is displayed,...