Is there an \"invisible\" tag in HTML (4) that I can use to make CSS distinctions
tag.myclass tag.mysubclass h1 { }
without having
I suspect you can use <object> tag without usual attributes for that purpose, but I haven't tested it thoroughly yet. It's even in HTML5 (unlike FONT tag).
While all browsers give default styling to many HTML tags, at it's core HTML only describes data, it doesn't format it.
What you're probably looking for is a DIV tag, because no browser gives any default styling to that tag.