< Cascading Style Sheets
Use background-position:0 -## where ## is equal to the y-coordinate of the first pixel of the desired area to reposition sprites
Use the background-position property to change the hover state of links with background images using CSS sprites
Use background-image instead of the background shorthand when using ID selectors to avoid inadvertently overriding class-based background-position changes for CSS sprites
Use the clip property on image tags to do foreground spriting
Make sure class selectors aren't inadvertently overridden by default values of ID selectors, especially background-position changes for sprites, by dividing the properties of ID selectors using longhand notation
References
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