outline

The CSS outline property is a shorthand property for setting one or more of the individual outline properties outline-style, outline-width and outline-color in a single rule. In most cases the use of this shortcut is preferable and more convenient.

Example

<!DOCTYPE html>
<html>
    <head>
        <style>
            p {
                border: 1px solid red;
                outline: green dotted thick;
            }
        </style>
    </head>
    <body>
        <p>
            <b>Note:</b>
            IE8 supports the outline properties only if a !DOCTYPE is 
            specified.
        </p>
    </body>
</html>