Something which I probably ought to have added to the site a long time ago but better late than never. This is an (X)HTML summary listing all of the (X)HTML tags and the attributes that each supports. The list excludes those tags and attributes that have been deprecated or which were never part of the [...]

The attributes set in your style sheet completely over ride any of the old deprecated HTML attributes that used to serve the same purpose. This means that if you define your page appearance properly then attempting to reference the deprecated HTML attributes from your JavaScript will have no effect.
Changing Stylesheet Attributes