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The CSS reference

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

  • The 'margin' property is a shorthand property for setting 'margin-top' , 'margin-right' , 'margin-bottom' and 'margin-left' at the same place in the style sheet.
  • If four length values are specified they apply to top, right, bottom and left respectively.
  • If there is only one value, it applies to all sides.
  • If there are two or three values, the missing values are taken from the opposite side.
  • Initial value: see individual properties
  • 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 - 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" example:

<!DOCTYPE HTML >
<html>
  <head>
    <style   type="text/css">
      .div1 { position: relative;
              width: 300px;
              margin: 10px 10px 10px 10px;
              border: #000000 1px solid;
      }
    </style>
  </head>
  <body >
    Text in Body
    <div class="div1">
      Some text in the DIV element with <br/>
      margin: 10px 10px 10px 10px;<br/>
    </div>
  </body>
</html>

Javascript access:

// To SET values ([o] is the target object)
[o].style.margin="margin values"
// You can not retrieve values through this property
// To get values, look at each of the margin properties.
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