I am needing to make a liquid layout that supports resolutions of 1024x768 and 1680x1050.
I am familiar with HTML but I have never made a layout before, not to mention a liquid layout, but I understand what a liquid layout is. Essentially the width's of containers are based on percentages rather than fixed pixel sizes.

My confusion though is, how does JavaScript play a role in this? What do I need to do with JavaScript related to liquid layouts so I know what to learn.

Secondly, if a liquid layout scales with the browser window size, why should I be concerned with 2 particular resolutions? So how would those 2 resolutions affect my creation of a liquid layout basically.

Thank you so much for any information provided, I'm just looking for answers to get a better understanding of this and to guide my learning.