This property is used to set or change the borderColor, borderStyle, and borderWidth values with one statement. borderColor values can be any decimal RGB, hexadecimal #RRGGBB, or any valid named color. The borderStyle options are as follows:
dashed dotted double groove hidden inset none outset ridge solid
The borderWidth values can be any of the following valid length measurement options:
mm millimeters. cm centimeters. in inches. pt points, which is a way of measuring the font size. One point is 1/72 (one seventy-second) of an inch. pc picas, which is yet another way of measuring font size. One pica is equal to 12 points. px pixels, which is one screen element. The display you're looking at is comprised of thousands of individual dots, each of which can change in color and luminosity to achieve the desired image. Each of these dots is referred to as a pixel.
ex x-height settings, which is the height of the font's lower case letter 'x'. em em setting. One em is equivalent to the width of a capital letter in the chosen font. Millimeters, centimeters, inches, points, and picas are considered to be absolute lengths because you're specifying the exact size of the value.
Relative units such as em and ex are interpreted as references to the parent font size.
syntax:
document.all.elementID.style.borderLeft = "value1 value2, etc"
This Property is used to access attributes of the following:
style