THIS IS AN OLD 100% DOM JS LIBRARY STARTED IN 2002 AND RELEASED TO THE PUBLIC IN 2006, AND IN SF IN 2009! THIS LIBRARY TRIED TO MIMIFY DESKTOP BEHAVIOUR AND WAS REALLY SOMETHING AHEAD ANY OTHER LIBS AT ITS TIME. USE IT ONLY TO UNDERSTAND HOW DOM WORKS IN PURE JS! (which basically excludes 85% of today's devs).
Not recommended for production anymore. It's still 100% functional (OGK for how long). I've just fixed a minor problem with z-index, If you want to run JsDesigner, the visual tool...