The following 6 pages demonstrate the background properties.
Rule for background-repeat.
body {background-image: url('bg-2.gif'); background-repeat: repeat-y}
The background image used for this page is bg-2.gif.
The background-repeat property has three values: repeat-y, repeat-x and no-repeat.
You see on the left margin of this page the repeat-y value. The image bg-2.gif is
repeating on the y-axis only, vertically.
This is what the image looks like without repeating.