CSS Reference

"margin-bottom" - css property (v. css 1)

  • Sets the bottom margin of an element
  • Initial value: 0
  • The property is not inherited
  • HTML usage: All elements except elements with table display types other than table-caption, table and inline-table
  • Browsers that support the margin-bottom - property :
    Internet Explorer Mozilla Firefox Opera Google Chrome Apple Safari

How width, height, margin, border and padding properties relates to each other:

Possible margin values:

margin value Comments CSS
length With this you specify a positive(+) or negative(-) value followed with a unit identifier. 1
percentage With this you specify a value with a percentage. It refer to width of containing block. 1
auto The outcome of this property value is much dependant on the related containing block type, replaced or none-replaced elements and the browser. For details, please study computing widths and margins for behavior. 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 "margin-bottom" example:

    <style   type="text/css">
      .div1 { position: relative;
              width: 300px;
              margin: 10px 10px 10px 10px;
              border: #000000 1px solid;
      .div2 { position: relative;
              width: 200px;
              margin-top: 20px;
              margin-right: 25px;
              margin-bottom: inherit;
              margin-left: 15px;
              border: blue 1px solid;
  <body >
    Text in Body
    <div class="div1">
      Some text in the DIV 1 element with <br/>
      margin: 10px 10px 10px 10px;<br/>
      <div class="div2">
        Some text in the DIV 2 element with <br/>
        margin-top: 20px;<br/>
        margin-right: 25px;<br/>
        margin-bottom: inherit;<br/>
        margin-left: 15px;<br/>

Javascript access:

// To SET values ([o] is the target object)
[o].style.marginBottom="margin-bottom 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.marginBottom;
// 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).
© 2010 by Finnesand Data. All rights reserved.
This site aims to provide FREE programming training and technics.
Finnesand Data as site owner gives no warranty for the correctness in the pages or source codes.
The risk of using this web-site pages or any program codes from this website is entirely at the individual user.