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HTML Attributes reference
Define the coloring alink bgcolor color link text vlink Defining element properties abbr alt char charoff code codebase codetype content datetime declare defer lang language media object scheme standby summary valuetype version Defining server directives accept accept-charset charset enctype http-equiv Defining user interface accesskey checked coords disabled ismap maxlength method multiple nohref noresize prompt readonly scrolling selected shape tabindex usemap value Designing layout align axis background class clear compact dir face for frame frameborder headers hspace label noshade rules scope span start style title type valign vspace Dimensioning border cellpadding cellspacing cols colspan height marginheight marginwidth rows rowspan size width Events onblur onchange onclick ondblclick onfocus onkeydown onkeypress onkeyup onload onmousedown onmousemove onmouseout onmouseover onmouseup onreset onselect onsubmit onunload Identification id name Resource referance action archive cite classid data href hreflang longdesc profile rel rev src target

The HTML Elements reference.

"colgroup" - html element

COLGROUP groups a set of 'col' elements.
It allows you to group several semantically related columns together.
Starttag <colgroup> is Required and endtag </colgroup> is Optional
Browsers that support the colgroup - element :

Element "colgroup" example:

<html>
  <head>
    <title>thead, tbody and tfoot element example</title>
  </head>
  <body>
    <table  border="8" cellspacing="5"
            cellpadding="5" align="center">
      <colgroup   >
        <col span="1" align="center" width="35" >
        <col span="1" align="left"   width="105" >
        <col span="2" align="right"  width="80" >
      </colgroup>
      <thead style="color:blue" >
        <tr><td>Amount</td><td>Description</td>
          <td>Unit Price</td><td>Price</td></tr>
      </thead>
      <tbody>
        <tr><td >2</td><td>Bread.</td>
          <td>4.0</td><td>8.00</td></tr>
        <tr><td >6</td><td>Beer.</td>
          <td>1.5</td><td>9.00</td></tr>
        <tr><td >1</td><td>Butter.</td>
          <td>3.0</td><td>3.00</td></tr>
      </tbody>
      <tfoot style="color:red" >
        <tr><td></td><td>Summary:</td>
          <td ></td><td >20.00</td></tr>
      </tfoot>
    </table>
  </body>
</html>

Attributes:
align (deprecated), char , charoff , class , dir , id , lang , span (Initial: 1), style , title , valign , width (deprecated)

Attribute "align" value(s): depend on which element left, center, right, justify or char

Specifies the horizontal alignment of its element with respect to the surrounding context. Specifies the alignment of data and the justification of text in a cell.

You should use styles (CSS) instead.

Differences in browser support for this attribute:

Possible attribute, align, values for this element:

Attribute value	description
left	Left-flush data/Left-justify text. This is the default value for table data.
center	Center data/Center-justify text. This is the default value for table headers.
right	Right-flush data/Right-justify text.
justify	Double-justify text.
char	Align text around a specific character. If a user agent doesn't support character alignment, behavior in the presence of this value is unspecified.

Attribute "char" value(s): character

Specifies a single character within a text fragment to act as an axis for alignment.

The default value for this attribute is the decimal point character for the current language as set by the lang attribute.

Attribute "charoff" value(s): length

Specifies the offset to the first occurrence of the alignment character on each line.

If a line doesn't include the alignment character, it should be horizontally shifted to end at the alignment position.

Attribute "class" value(s): A list of style class names that must be separated by white space characters.

This attribute assigns a style class name or set of style class names to an element. Any number of elements may be assigned the same class name or names.

You will find more about this in the CSS learning on this site.

Attribute "dir" value(s): ltr or rtl

Specifies the base direction of directionally neutral text in an element's content and attribute values. It also specifies the directionality of tables.

Possible attribute, dir, values for this element:

Attribute value	description
ltr	Left-to-right text or table.
rtl	Right-to-left text or table.

Attribute "id" value(s): unique name

This attribute assigns an identification name to an element. This name must be unique in a document

Id is often used when one wants to search for an item using javascript or vbscript.

Attribute "lang" value(s): language-code

Specifies the base language of an element's attribute values and text content.

List of some of the ISO 639-1 lang code :

Lang code	Name of Language
aa	Afar
ab	Abkhazian
af	Afrikaans
ak	Akan
sq	Albanian
am	Amharic
ar	Arabic
an	Aragonese
hy	Armenian
as	Assamese
av	Avaric
ae	Avestan
ay	Aymara
az	Azerbaijani
ba	Bashkir
bm	Bambara
be	Belarusian
bn	Bengali
bh	Bihari languages
bi	Bislama
bo	Tibetan
bs	Bosnian
br	Breton
bg	Bulgarian
my	Burmese
ca	Catalan; Valencian
cs	Czech
ch	Chamorro
ce	Chechen
zh	Chinese
cu	Church Slavic; Old Slavonic; Church Slavonic; Old Bulgarian; Old Church Slavonic
cv	Chuvash
kw	Cornish
co	Corsican
cr	Cree
cy	Welsh
cs	Czech
da	Danish
de	German
dv	Divehi; Dhivehi; Maldivian
nl	Dutch; Flemish
dz	Dzongkha
el	Greek, Modern (1453-)
en	English
eo	Esperanto
et	Estonian
eu	Basque
ee	Ewe
fo	Faroese
fa	Persian
fj	Fijian
fi	Finnish
fr	French
fr	French
fy	Western Frisian
ff	Fulah
ka	Georgian
de	German
gd	Gaelic; Scottish Gaelic
ga	Irish
gl	Galician
gv	Manx
el	Greek, Modern (1453-)
gn	Guarani
gu	Gujarati
ht	Haitian; Haitian Creole
ha	Hausa
he	Hebrew
hz	Herero
hi	Hindi
ho	Hiri Motu
hr	Croatian
hu	Hungarian
hy	Armenian
ig	Igbo
is	Icelandic
io	Ido
ii	Sichuan Yi; Nuosu
iu	Inuktitut
ie	Interlingue; Occidental
ia	Interlingua (International Auxiliary Language Association)
id	Indonesian
ik	Inupiaq
is	Icelandic
it	Italian
jv	Javanese
ja	Japanese
kl	Kalaallisut; Greenlandic
kn	Kannada
ks	Kashmiri
ka	Georgian
kr	Kanuri
kk	Kazakh
km	Central Khmer
ki	Kikuyu; Gikuyu
rw	Kinyarwanda
ky	Kirghiz; Kyrgyz
kv	Komi
kg	Kongo
ko	Korean
kj	Kuanyama; Kwanyama
ku	Kurdish
lo	Lao
la	Latin
lv	Latvian
li	Limburgan; Limburger; Limburgish
ln	Lingala
lt	Lithuanian
lb	Luxembourgish; Letzeburgesch
lu	Luba-Katanga
lg	Ganda
mk	Macedonian
mh	Marshallese
ml	Malayalam
mi	Maori
mr	Marathi
ms	Malay
mk	Macedonian
mg	Malagasy
mt	Maltese
mn	Mongolian
mi	Maori
ms	Malay
my	Burmese
na	Nauru
nv	Navajo; Navaho
nr	Ndebele, South; South Ndebele
nd	Ndebele, North; North Ndebele
ng	Ndonga
ne	Nepali
nl	Dutch; Flemish
nn	Norwegian Nynorsk; Nynorsk, Norwegian
nb	Bokmål, Norwegian; Norwegian Bokmål
no	Norwegian
ny	Chichewa; Chewa; Nyanja
oc	Occitan (post 1500)
oj	Ojibwa
or	Oriya
om	Oromo
os	Ossetian; Ossetic
pa	Panjabi; Punjabi
fa	Persian
pi	Pali
pl	Polish
pt	Portuguese
ps	Pushto; Pashto
qu	Quechua
rm	Romansh
ro	Romanian; Moldavian; Moldovan
ro	Romanian; Moldavian; Moldovan
rn	Rundi
ru	Russian
sg	Sango
sa	Sanskrit
si	Sinhala; Sinhalese
sk	Slovak
sk	Slovak
sl	Slovenian
se	Northern Sami
sm	Samoan
sn	Shona
sd	Sindhi
so	Somali
st	Sotho, Southern
es	Spanish; Castilian
sq	Albanian
sc	Sardinian
sr	Serbian
ss	Swati
su	Sundanese
sw	Swahili
sv	Swedish
ty	Tahitian
ta	Tamil
tt	Tatar
te	Telugu
tg	Tajik
tl	Tagalog
th	Thai
bo	Tibetan
ti	Tigrinya
to	Tonga (Tonga Islands)
tn	Tswana
ts	Tsonga
tk	Turkmen
tr	Turkish
tw	Twi
ug	Uighur; Uyghur
uk	Ukrainian
ur	Urdu
uz	Uzbek
ve	Venda
vi	Vietnamese
vo	Volapük
cy	Welsh
wa	Walloon
wo	Wolof
xh	Xhosa
yi	Yiddish
yo	Yoruba
za	Zhuang; Chuang
zh	Chinese
zu	Zulu

Attribute "span" value(s): number

Specifies the number of columns "spanned" by the COL element or the COLGROUP element In the absence of a span attribute, each COLGROUP defines a column group containing one column.

This attribute must be an integer > 0. (Default value is 1 ) If the span attribute is set to N > 0, the current COLGROUP element defines a column group containing N columns.

Attribute "style" value(s): style

Specifies style sheet (CSS) information for the current element.The syntax of the value of the style attribute is determined by the default style sheet language.

You will find more about this in the CSS learning on this site.

Attribute "title" value(s): text

This attribute offers advisory information about the element for which it is set.

Differences in browser support for this attribute:

Attribute "title" example:

<html>
  <head>
    <title>title attribute</title>
  </head>
  <body >
    <h1 title="Heading 1">This is a Heading 1</h1>
    <h2 title="Heading 2">This is a Heading 2</h2>
    <h3 title="Heading 3">This is a Heading 3</h3>
    <h4 title="Heading 4">This is a Heading 4</h4>
    <h5 title="Heading 5">This is a Heading 5</h5>
    <h6 title="Heading 6">This is a Heading 6</h6>
  </body>
</html>

Attribute "valign" value(s): top, middle, bottom or baseline

Specifies the vertical position of data within a cell.

Differences in browser support for this attribute:

Possible attribute values for this element:

Attribute value	description
top	Cell data is flush with the top of the cell.
middle	Cell data is centered vertically within the cell. This is the default value.
bottom	Cell data is flush with the bottom of the cell.
baseline	All cells in the same row as a cell whose valign attribute has this value should have their textual data positioned so that the first text line occurs on a baseline common to all cells in the row. This constraint does not apply to subsequent text lines in these cells.

Attribute "width" value(s): multi length

This attribute specifies the width of the rule. The default width is 100%, i.e., the rule extends across the entire canvas. specifies a default width for each column in the current column group. In addition to the standard pixel, percentage, and relative values, this attribute allows the special form "0*" (zero asterisk) which means that the width of the each column in the group should be the minimum width necessary to hold the column's contents.

You should use styles (CSS) instead. (except for the object and iframe element) This attribute is overridden for any column in the column group whose width is specified via a COL element.

Events:
onclick , ondblclick , onkeydown , onkeypress , onkeyup , onmousedown , onmousemove , onmouseout , onmouseover , onmouseup

Event "onclick" value(s): One or more script statements each ended with a semicolon.

The onclick event occurs when the pointing device button is clicked over an element.

Differences in browser support for this attribute:

Attribute "onclick" example:

<html>
  <head>
    <title>onclick Event attribute</title>
  </head>
  <body bgcolor="Silver" text="Blue"
      onclick="alert('you click on th body text')" >
      The onclick event occurs when the pointing device
      button is clicked over an element.
  </body>
</html>

Event "ondblclick" value(s): One or more script statements each ended with a semicolon.

The ondblclick event occurs when the pointing device button is double clicked over an element.

Differences in browser support for this attribute:

Attribute "ondblclick" example:

<html>
  <head>
    <title>ondblclick Event attribute</title>
  </head>
  <body bgcolor="Silver" text="Blue"
      ondblclick="alert('you double-click on th body text')" >
      The ondblclick event occurs when the pointing
device button is double clicked over an element.
  </body>
</html>

Event "onkeydown" value(s): One or more script statements each ended with a semicolon.

The onkeydown event occurs when a key is pressed down over an element.

Differences in browser support for this attribute:

Attribute "onkeydown" example:

<html>
  <head>
    <title>onkeydown Event attribute</title>
  </head>
  <body bgcolor="Silver" text="Blue"
      onkeydown="alert('you have pressed a key down')" >
      The onkeydown event occurs when a
      key is pressed down over an element.
  </body>
</html>

Event "onkeypress" value(s): One or more script statements each ended with a semicolon.

The onkeypress event occurs when a key is pressed and released over an element.

Differences in browser support for this attribute:

Attribute "onkeypress" example:

<html>
  <head>
    <title>onkeypress Event attribute</title>
  </head>
  <body bgcolor="Silver" text="Blue"
      onkeypress="alert('you have pressed and released a key')" >
      The onkeypress event occurs when a key is
      pressed and released over an element.
  </body>
</html>

Event "onkeyup" value(s): One or more script statements each ended with a semicolon.

The onkeyup event occurs when a key is released over an element.

Differences in browser support for this attribute:

Attribute "onkeyup" example:

<html>
  <head>
    <title>onkeyup Event attribute</title>
  </head>
  <body bgcolor="Silver" text="Blue"
      onkeyup="alert('A key is released over an element')" >
      The onkeyup event occurs when a key is
     released over an element.
  </body>
</html>

Event "onmousedown" value(s): One or more script statements each ended with a semicolon.

The onmousedown event occurs when the pointing device button is pressed over an element.

Differences in browser support for this attribute:

Attribute "onmousedown" example:

<html>
  <head>
    <title>onmouseup Event attribute</title>
  </head>
  <body bgcolor="Silver" text="Blue"
      onmouseup="alert('The mouse button is pressed down')" >
      The onmouseup event occurs when the pointing
      device button is released over an element.
  </body>
</html>

Event "onmousemove" value(s): One or more script statements each ended with a semicolon.

The onmousemove event occurs when the pointing device is moved while it is over an element.

Differences in browser support for this attribute:

Attribute "onmousemove" example:

<html>
  <head>
    <title>onmousemove Event attribute</title>
  </head>
  <body bgcolor="Silver" text="Blue"
      onmousemove="document.body.text='red'" >
      The onmousemove event occurs when the
      pointing device is moved while it is over an element.
  </body>
</html>

Event "onmouseout" value(s): One or more script statements each ended with a semicolon.

The onmouseout event occurs when the pointing device is moved away from an element.

Differences in browser support for this attribute:

Attribute "onmouseout" example:

<html>
  <head>
    <title>onmouseover and onmouseout Event attributes</title>
  </head>
  <body bgcolor="Silver" text="Blue"
      onmouseover="document.body.text='red'"
      onmouseout="document.body.text='black'" >
      The onmouseover event occurs when the
      pointing device is moved onto an element.<br>
      The onmouseout event occurs when the
      pointing device is moved away from an element.
  </body>
</html>

Event "onmouseover" value(s): One or more script statements each ended with a semicolon.

The onmouseover event occurs when the pointing device is moved onto an element.

Differences in browser support for this attribute:

Attribute "onmouseover" example:

<html>
  <head>
    <title>onmouseover and onmouseout Event attributes</title>
  </head>
  <body bgcolor="Silver" text="Blue"
      onmouseover="document.body.text='red'"
      onmouseout="document.body.text='black'" >
      The onmouseover event occurs when the
      pointing device is moved onto an element.<br>
      The onmouseout event occurs when the
      pointing device is moved away from an element.
  </body>
</html>

Event "onmouseup" value(s): One or more script statements each ended with a semicolon.

The onmouseup event occurs when the pointing device button is released over an element.

Differences in browser support for this attribute:

Attribute "onmouseup" example:

<html>
  <head>
    <title>onmouseup Event attribute</title>
  </head>
  <body bgcolor="Silver" text="Blue"
      onmouseup="alert('The mouse button is released')" >
      The onmouseup event occurs when the
      pointing device button is released over an element.
  </body>
</html>

The colgroup element can contain the following element(s):

Elements	Description
col	This element defines attributes common to a table column.

The colgroup element can be contained in the following element(s):

Elements	Description
table	The HTML table model allows you to arrange text, images, links, forms, form fields, other tables, etc. into rows and columns of cells.

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