Liquid layouts resize to fit your monitor
It is a perennial problem for web designers - creating a design that will look good across all platforms, browsers, monitor sizes, screen resolutions and type size preferences.
One answer is to create a design for the lowest possible denominator. These designs are most common, usually about 780 pixels wide with great big blank columns – if you view them on a larger monitor.
Another answer, which is still quite new, is a liquid layout. That is to say that non of the dimensions are fixed, and the layout resizes itself proportionally to fill the screen of every monitor. For example:
1024 pixels width
800 pixels width
Screen Resolution Popularity
Greater than 1024 pixels – 26%
1024 X 768 pixels – 54%
800 X 600 pixels – 14%
Unknown – 6%
Source W3C Schools May 2007