CSS Reference

"border-bottom-width" - css property (v. css 1)

  • Sets the width of an element's bottom border.
  • To set all border equal width use 'border-width' .
  • Initial value: medium
  • The property is not inherited
  • HTML usage: all elements
  • Can be given as 'inherit' or a width as specified below.
  • The 'inherit' is a CSS 2 property value.
  • Browsers that support the border-bottom-width - property :
    Internet Explorer Mozilla Firefox Opera Google Chrome Apple Safari

Possible width values:

Values Comments CSS
thin, medium or thick The width of the keyword values are UA dependent, but the following holds: 'thin' <= 'medium' <= 'thick'. 1
length With this you specify a value with a unit identifier. 1
inherit Will inherit the value from parent specification. This property value is new with CSS 2. 2

Possible unit identifier:

unit identifier Comments CSS
em The relative unit 'em' is relative to the font size of the element itself. 1
ex The relative unit 'ex' is relative to the font size of the element itself. 1
px Pixels, relative to the viewing device 1
in inches -> 1 inch is equal to 2.54 centimeters. 1
cm centimeters. 1
mm millimeters. 1
pt points -> the points used by CSS2 are equal to 1/72th of an inch. 1
pc picas -> 1 pica is equal to 12 points. 1

Property "border-bottom-width" example:

<!DOCTYPE HTML >
<html  >
  <head>
    <title>Test</title>
    <style type="text/css">
      .presentation {
        border-bottom-color: #4DFFFF;
        border-bottom-style:  dotted;
        border-bottom-width: 22px;
        width: 400px;
        }
     </style>
  </head>
  <body>
    <div class='presentation'  >The Inherit value is inherited from
          the parent specification. This property value is new
          with CSS 2.
    </div>
  </body>
</html>

Javascript access:

// To SET values ([o] is the target object)
[o].style.borderBottomWidth="border-bottom-width value"
// To GET values you must first get the computed style object
// To get that object in IE or Opera:
var cStyle=[o].currentStyle;
// To get that object in Firefox, Chrome or Safari (w3c-type):
var cStyle=window.getComputedStyle([o],null)
// To GET the property value:
var value=cStyle.borderBottomWidth;
/* Don't expect to get the initial value
  for a NOT pre-set border width.*/
/* IE and Opera will return a value in units as used with a Set. Firefox will return a calculated float value in pixel(px). Chrome or Safari will return a calculated int value in pixel(px)*/
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