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HTML4 Reference

HTML <optgroup> tag

Definition

The <optgroup> tag is used to define a group of related options.

Example


<select>
  <optgroup label="labelName">
    <option value="round">round</option>
    <option value="square">square</option>
  </optgroup>
</select>

Required Attributes

label - specifies the viewable title of a group of options.


<optgroup label="labelName"></optgroup>

Optional Attributes

disabled - specifies the optgroup will be disabled until a certain condition occurs.


<optgroup label="labelName" disabled="disabled"></optgroup>

Common Attributes

accesskey - specifies a keyboard shortcut to an element.


<optgroup label="labelName" accesskey="aKey"></optgroup>

class - specifies a classname for the element allowing you to apply the style of the predefined class to the content.


<optgroup label="labelName" class="classname"></optgroup>

id - specifies a unique id for the element allowing you to apply the style of the predefined id to the content.


<optgroup label="labelName" id="idname"></optgroup>

style - specifies an inline style for the element allowing you to apply the style to the content.


<optgroup label="labelName" style="color:red;text-align:left"></optgroup>

title - specifies extra information about the content.


<optgroup label="labelName" title="information about the content"></optgroup>

Language Attributes

dir - specifies the directional flow of the content.


<!-- The text will flow from left to right -->
<optgroup label="labelName" dir="ltr"></optgroup>

<!-- The text will flow from right to left -->
<optgrouplabel="labelName"  dir="rtl"></optgroup>

lang - specifies a language code for the content of the element.


<optgroup label="labelName" lang="en"></optgroup>

xml:lang - specifies a language code for the content of the element in XHTML documents.


<optgroup label="labelName" xml:lang="fr"></optgroup>

Document Event Attributes

NONE

Form Event Attributes

onblur - The JavaScript code to be run when an element loses focus.


<!-- Executes the go() function -->
<optgroup label="labelName" onblur="go()"></optgroup>

onchange - The JavaScript code to be run when an element gains focus.


<!-- Executes the go() function -->
<optgroup label="labelName" onchange="go()"></optgroup>

onfocus - The JavaScript code to be run when an element loses focus.


<!-- Executes the go() function -->
<optgroup label="labelName" onfocus="go()"></optgroup>

onselect - The JavaScript code to be run when an element gains focus.


<!-- Executes the go() function -->
<optgroup label="labelName" onselect="go()"></optgroup>

Image Event Attributes

NONE

Keyboard Event Attributes

onkeydown - The JavaScript code to be run when an element is in focus and keyboard key is pressed.


<!-- Executes the go() function -->
<optgroup label="labelName" onkeydown="go()"></optgroup>

onkeypress - The JavaScript code to be run when an element is in focus and keyboard key is pressed down and released.


<!-- Executes the go() function -->
<optgroup label="labelName" onkeypress="go()"></optgroup>

onkeyup - The JavaScript code to be run when an element is in focus and keyboard key is released.


<!-- Executes the go() function -->
<optgroup label="labelName" onkeyup="go()"></optgroup>

Mouse Event Attributes

onclick - The JavaScript code to be run when a mouse is clicked on the element.


<!-- Executes the go() function -->
<optgroup label="labelName" onclick="go()"></optgroup>

ondblclick - The JavaScript code to be run when a mouse is double clicked on the element.


<!-- Executes the go() function -->
<optgroup label="labelName" ondblclick="go()"></optgroup>

onmousedown - The JavaScript code to be run when the mouse button is pressed down while the cursor is over the element.


<!-- Executes the go() function -->
<optgroup label="labelName" onmousedown="go()"></optgroup>

onmousemove - The JavaScript code to be run when the mouse button is moved.


<!-- Executes the go() function -->
<optgroup label="labelName" onmousemove="go()"></optgroup>

onmouseout - The JavaScript code to be run when the mouse cursor moves off an element.


<!-- Executes the go() function -->
<optgroup label="labelName" onmouseout="go()"></optgroup>

onmouseover - The JavaScript code to be run when the mouse cursor moves over an element.


<!-- Executes the go() function -->
<optgroup label="labelName" onmouseover="go()"></optgroup>

onmouseup - The JavaScript code to be run when the mouse button is released while the cursor is over the element.


<!-- Executes the go() function -->
<optgroup label="labelName" onmouseup="go()"></optgroup>


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HTML Elements

The complete set of HTML elements also known as HTML tags from the latest HTML 4.01 Specification.

Click the links for more information on individual tags and their attributes.

<!--...-->

<!DOCTYPE>

<a>

<abbr>

<acronym>

<address>

<applet>

<area />

<b>

<base />

<basefont />

<bdo>

<big>

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<body>

<br />

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<colgroup>

<dd>

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<h1> - <h6>

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<kbd>

<label>

<legend>

<li>

<link />

<map>

<menu>

<meta />

<noframes>

<noscript>

<object>

<ol>

<optgroup>

<option>

<p>

<param />

<pre>

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<s>

<samp>

<script>

<select>

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<tr>

<tt>

<u>

<ul>

<var>