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HTML BLOCK
HTML HEAD BODY
HEADER
TITLE META STYLE LINK SCRIPT NOSCRIPT BASE
HEADER [cont'd]
BASEFONT
TEXT BLOCK
P SPAN DIV
TEXT
<B> <I> <U> FONT DIR BR HR CENTER <SMALL> <BIG>
TEXT [cont'd]
STRONG BLOCKQUOTE Q H1 - H6 PRE <S> <STRIKE> <SUB> <SUP>
TEXT FONT STYLE
ABBR ACRONYM ADDRESS BDO CITE CODE DFN
TEXT FONT STYLE [cont'd]
EM KBD SAMP VAR TT INS DEL
LINKING
A PARAM IMG
LIST
OL UL LI DL DT DD
TABLE
TABLE TR TH TD THEAD TBODY TFOOT
TABLE [cont'd]
CAPTION COLGROUP COL
FORM ELEMENTS
FORM INPUT INPUT[TEXT] INPUT[RADIO] INPUT[CHECKBOX] INPUT[SUBMIT] SELECT
FORM ELEMENTS [cont'd]
OPTGROUP OPTION TEXTAREA
COMPONENTS
BUTTON LEGEND FIELDSET FRAME NOFRAMES FRAMESET IFRAME
COMPONENTS [cont'd]
LABEL MENU OBJECT
PAGE EVENTS
onload onunload
MOUSE EVENTS
onclick ondblclick onmousedown onmousemove onmouseout onmouseover onmouseup
MOUSE EVENTS [cont'd]
onselect
KEYBOARD EVENTS
onkeydown onkeypress onkeyup onblur onchange onfocus
FORM EVENTS
onreset onsubmit
COLGROUP in TABLE of HTML 4
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Usage 
The colgroup is used to group one or more columns for grouping.
Example
<html>
<body>

<table >
<colgroup >
    <col span="2" width="200" align="left" style="background-color:orange"></colgroup>
    <col width="400" align="middle" style="background-color:yellow">
  </colgroup>
  <tr>
    <th>Week</th>
    <th>day</th>
    <th>price</th>
  </tr>
  <tr>
    <td>1</td>
    <td>monday</td>
    <td>56</td>
  </tr>
  <tr>
    <td>2</td>
    <td>tuesday</td>
    <td>5</td>
  </tr>
</table>

</body>
</html>
Example 
Week day price
1 monday 56
2 tuesday 5
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TABLE of HTML 4
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TABLE of HTML 4
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