border-top-width
The border-top-width CSS property sets the width of the top border of a box.
Syntax
CSS
border-top-width: value;
JS
object.style.borderTopWidth = "value";
Values
<'border-top-width'> = <line-width>
<line-width> = <length [0,∞]> | thin | medium | thick
<length>
Specifies the length using a number followed by a unit of measurement.
thin
A thin line.
medium
A medium line.
thick
A thick line.
Initial
medium