Pre-moves in live chess

First off, I apologize if this has been asked already, I didn't search it.

I remember a while ago live chess had the pre-move function. You could make a move that would automatically be made provided it was still legal after your opponents turn. I miss this function. I like playing blitz games (and I realize yes, if I want more time, maybe I shouldn't be playing fast games). The fact is that in a blitz game a one second advantage can win games that are completely lost. I'm tired of losing while pushing the only pawn left on the board because I have to lose half a second every move. I just like the option. If nothing else, I'm curious as to why the function was removed in the first place.

It's still here

Go to this link: http://www.chess.com/home/livechess_settings.html , and click enable premove.

Thanks guys. Didn't cross my mind it might be a user-defined option.