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The HTML <optgroup> tag is used for grouping related options within your select list. This makes it easier for users to comprehend their choices when looking at a large list.
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<select> <optgroup label="India"> <option value ="mumbai">Mumbai</option> <option value ="delhi">Delhi</option> </optgroup> <optgroup label="USA"> <option value ="maryland">Marland</option> <option value ="newyork">New York</option> </optgroup> </select> |
This will produce following result:
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Attribute | Value | Description |
---|---|---|
disabled | disabled | Disables the input control. The button won't accept changes from the user. It also cannot receive focus and will be skipped when tabbing. |
label | text | Defines a label to use when using <optgroup>. |
Attribute | Description |
---|---|
class | Document wide identifier |
dir | Specifies the direction of the text |
id | Document wide identifier |
title | Specifies a title to associate with the element. |
style | Helps to include inline casecadubf style sheet. |
lang | Sets the language code. |
xml:lang | Sets the language code. |
tabindex | Helps determine the tabbing order |
Attribute | Description |
---|---|
onclick | Script runs when a mouse click |
ondblclick | Script runs when a mouse double-click |
onmousedown | Script runs when mouse button is pressed |
onmouseup | Script runs when mouse button is released |
onmouseover | Script runs when mouse pointer moves over an element |
onmousemove | Script runs when mouse pointer moves |
onmouseout | Script runs when mouse pointer moves out of an element |
onkeypress | Script runs when key is pressed and released |
onkeydown | Script runs when key is pressed |
onkeyup | Script runs when key is released |
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