From http://www.w3schools.com (Copyright Refsnes Data)

HTML <option> tag

Example

A drop-down list with four options:

<select>
<option>Volvo</option>
<option>Saab</option>
<option>Mercedes</option>
<option>Audi</option>
</select>

The <option> tag defines an option in a select list.

The option element goes inside the select element.

The <option> tag is supported in all major browsers.

In HTML the <option> tag has no end tag.

In XHTML the <option> tag must be properly closed.

Tip: If you have a long list of options, you can group together related options with the <optgroup> tag.

DTD indicates in which DTD the attribute is allowed. S=Strict, T=Transitional, and F=Frameset.

Attribute	Value	Description	DTD
disabled	disabled	Specifies that an option should be disabled	STF
label	text	Specifies a shorter label for an option	STF
selected	selected	Specifies that an option should be selected by default	STF
value	text	Specifies the value to be sent to a server when a form is submitted	STF

id, class, title, style, dir, lang, xml:lang, tabindex

For a full description, go to Standard Attributes.

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

For a full description, go to Event Attributes.