PUBLIC MARKS from sledge with tag optimisation

After all the work of WASP and others to promote clean markup, valid pages and graceful degradataion via css - it sucks that we're going back to tag soup days by throwing javascript tags into our html. The better way to do javascript is to do it unobtrusively. PPK and Simon Willison have been recommending this approach for ages. And it's definitely the way to go. The only problem is that it's a bit of a pain in the ass. That's why I came up with Behaviour - my solution to unobtrusive javascript behaviours.

Opera has one of the fastest and most efficient JavaScript engines of any browser, but when you have multiple User JavaScripts installed, it is important that they run efficiently to keep Opera's performance as high as possible. Well written code will help to minimise the performance impact of User JavaScripts.