Overlay with spinner

Question

I\'m trying to create an overlay that overlays a page with a spinner in the middle. What\'s the simplest way to accomplish this? I only need to worry about IE 8 and above.

Answer 1

#overlay {
    position: fixed;
    width: 100%;
    height: 100%;
    background: black url(spinner.gif) center center no-repeat;
    opacity: .5;
}

it's better to use rgba color instead of opacity to prevent applying alpha to spinner image.

background: rgba(0,0,0,.5) url(spinner.gif) center center no-repeat;