Most designers use 1024x768 as a baseline for website development. That allows them to use css grid systems like 960 & blueprint to easily outline content. Is there simila
I write games for mobile devices. In my code I position everything by percentage as it will always be the same, plus I also use a var to adjust how many pixels they have then set my resolution to suit You can do pretty much the same with css and a few different image size's in your resources.