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

HTML <button> tag

Example

A button is marked up as follows:

<button type="button">Click Me!</button>

Definition and Usage

The <button> tag defines a push button.

Inside a button element you can put content, like text or images. This is the difference between this element and buttons created with the input element.

Always specify the type attribute for the button. The default type for Internet Explorer is "button", while in other browsers (and the W3C specification) it is "submit".

Browser Support

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

Important: If you use the button element in an HTML form, different browsers will submit different values. Internet Explorer will submit the text between the <button> and </button> tags, while other browsers will submit the content of the value attribute. Use the input element to create buttons in an HTML form.

Differences Between HTML and XHTML

NONE

Optional Attributes

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

Attribute	Value	Description	DTD
disabled	disabled	Disables the button	STF
name	button_name	Specifies a name for the button	STF
type	button reset submit	Defines the type of button	STF
value	some_value	Specifies an initial value for the button. The value can be changed by a script	STF

Standard Attributes

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

For a full description, go to Standard Attributes.

Event Attributes

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

For a full description, go to Event Attributes.