Documentation can be found here: http://ni-c.github.com/heimcontrol.js/
Added a method to control Active low relays such as this one here. Since these are active low, they need to be switched off inorder to turn them on. I simply made another method, (Active low) that reverses the switches used in the led method. In order for this to work, i also use another duino lib name Active low which can be downloaded here.