Full background image is now becoming a trend in web design. By the help of jquery plug-in, you can now have an image that is fit to any screen resolutions.
To stand-out from a normal full-sized screen background image, you can add spices to your images by having a slider or random image.
I found Supersized Jquery Plugin. This is a great plugin that lets you use a background image the resizes depending on the size of the monitor.
You can see the demo and download this amazing Jquery Script here.