Javascript function that works with or without CSS3 [closed]

Question

How would you implement a Javascript function that fades out a DOM element, using CSS3 if available (but is still functional when CSS3 isn't available)?

Answer 1

I'd use something like Modernizr to detect if css3 transitions are available or not:

if(!Modernizr.csstransitions) {
    // css3 isn't available
    // maybe dealing with it in jQuery ?? or plain js
}