The CSS reference

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

  • This property specifies the content height of boxes generated by block-level, inline-block and replaced elements.
  • Replaced element is content which is outside the scope of the CSS formatting model, such as an image, embedded document, or applet.
  • This property does not apply to non-replaced inline-level elements.
  • Initial value: auto
  • The property is not inherited
  • HTML usage: All elements but non-replaced inline elements, table columns, and column groups
  • Browsers that support the height - property :
    Internet Explorer Mozilla Firefox Opera Google Chrome Apple Safari

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

Possible height values:

height value Comments CSS
length With this you specify a positive value followed with a unit identifier (it cannot be negative). 1
percentage With this you specify a value with a percentage. It refer to height of containing block. If the height of the containing block is not specified explicitly, the value is interpreted like 'auto'. 2
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

Javascript access:

// To SET values ([o] is the target object)
[o].style.height="height 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.height;
// 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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