Ive been roaming around on Google for jquery drop down menu plugin solution but it has to be CSS2. For example I like this solution: nettuts.s3.amazonaws.com/699_nav/navCode/nav.html but it uses CSS3 so my questions is please:
“Is there any quickfire ways of recognizing in the code wether or not its CSS2 or CSS3”
In a word “no”.
As far as I know, and I would be happy to be proved wrong, it is not possible to programatically distinguish a CSS2 solution from a CSS3 one.
If I was you, I would approach the problem from the other direction.
Why not add some JavaScript to retrofit the CSS3 properties which your solution uses?
If this sounds interesting, CSS Pie might be a good place to start looking: http://css3pie.com/