You can use several properties with images:
background-image— Sets a background image. Set this to a URL.
background-repeat— Specifies whether the background image should be tiled. You can set this to repeat, repeat-x, repeat-y, or no-repeat.
background-attachment— Specifies whether the background scrolls with the rest of the document.
background-position— Sets the initial position of the background. Specify an x and y coordinate here (where the origin is at the upper left), such as background-position: 0% 100% to add a background image to the lower left.
There's also a background shorthand property that you can set to the background color, image, repeat, attachment, and position all at once (list those values in order).