Ever find a link or button on a website that looked interesting but was disabled? Did you feel frustrated when you didn't know why that certain something was disabled? This is a prime example of where a little hint as to why something is the way it is would be oh so useful. These hints are commonly referred to as tooltips, and a nice little javascript library named Tooltip.js handles this nifty little feature. Looking at their demos, it seems like a nice tool in the toolbelt. We'll see how nicely it plays with Caseman.