The css tab in firebug? it shows the existing rules and properties, and you can add to those rules and properties?
How can I programmatically add to these rules and properties?
I am using some homemade tools to create divs in the browser, and then would like to be able to take an existing div's css state and turn it into a new rule. I may have to develop a firebug plugin to do it, but on the off chance it can be done from the DOM...