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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
OPTGROUP in FORM ELEMENTS of HTML 4
1916 Views
Usage 
Optgroup tag is used to group list of items in drop down.
Disabled attribute is used to disable specific group of item.
The label attribute is used to specifies a label for an option-group.
Example
<html>
<body>


<select>
  <optgroup label="Veg">
    <option value="carrot">carrot</option>
    <option value="Peas">Peas</option>
  </optgroup>
  <optgroup label="non veg" disabled>
    <option value="Chicken">chicken</option>
    <option value="mutton">mutton</option>
  </optgroup>
</select>

</html>
</body>
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FORM ELEMENTS of HTML 4
FORM ELEMENTS of HTML 4
COMPONENTS of HTML 4
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