Property Reference - CSS Reference - page 118

Name
border-bottom
Values:
<'border-width'> || <'border-style'> || <color>
Initial value:
Not defined for shorthand properties
Applies to:
All elements
Inherited:
No
Computed value:
See individual properties
Description:
A shorthand property that defines the width, color, and style of the bottom border of an ele-
ment. As with border , omission of a border style will result in no border appearing.
Examples:
ul {border-bottom: 0.5in groove green;}
a:active {border-bottom: purple 2px dashed;}