How to make full screen background in a web page

Question

How to make an image as background for web page, regardless of the screen size displaying this web page? I want to display it properly. How?

Answer 1

A quick search for keywords background generator shows this CSS3 produced background pattern that's dynamically created.

By keeping the image small and repeatable, you won't have problems with it loading on mobile devices and the small image file-size takes care of memory concerns.

Here's the markup for the head section:

If your going to use an image of something that should preserve aspect ratio, such as people or objects, then you don't want 100% for width and height since that will stretch the image out of proportion. Instead check out this quick tutorial that shows different methods for applying background images using CSS.