Conditional comments of IE
Different browsers support different tags/ scripting features, and as webmasters, the challenge for many of us has always been on how to incorporate and make use of these various features while at the same time taking browser degradability into consideration (whew).
Well, IE (starting in IE5+ to be exact) offers a unique solution to this whole content degradability matter that is, in our opinion, truly revolutionary, both in its ease of implementation, and versatility. Called Conditional Comments (CC), it was love at first sight for us. Ok, time to stop the rumbling, and start talking.