[RealCodeBeard]

Loads have commented rightly on the simplicity (nay elegance) of the solution. I can't fault the use of JQuery even if I have never been a fan. I also agree that sometimes just building something as opposed to searching for someone else's solution is the right choice. Especially when you look at some of the foolish 'kata' time people spend when they could practice on something business-useful like this.

Most of all, to see the thought process played out is really important. This article would make great reading for juniors to help see how more experienced people solve problems. Particularly as it is not a patronising 'tutorial' (draw three circles, then draw an owl) but working through a clear scenario.