Is there a web version of a chess clock for mobile phones without (distracting) advertisements? I am looking for a very simple Chess Clock (simple design - see picture) to use from the phone browser WITHOUT having to download an app. I already know apps who have this I am looking for a web version! 
This is an example for a good app:





And here is an example of a bad web version with bad design and too many distractions, looks especially bad on mobile:
Best Solution:


chessclock.org - add the website to the home screen on your phone and tilt the phone to the side


Added in the comments: chessclock.iphonemarks.com



Original suggestions:


skakur.dk
ksloan.net/chessclock