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16.5 Check Boxes and Radio Buttons

405

JavaScript Buttons

HTML Element:

 (No End Tag)

Attributes:

NAME

, 

VALUE

, 

ONCLICK

, 

ONDBLCLICK

, 

ONFOCUS

, 

ONBLUR

The 

BUTTON

 element is recognized only by browsers that support JavaScript.

It creates a button with the same visual appearance as a 

SUBMIT

 or 

RESET

button and allows the author to attach JavaScript code to the 

ONCLICK

,

ONDBLCLICK

, 

ONFOCUS

, or 

ONBLUR

 attributes. The name/value pair associated

with a JavaScript button is not transmitted as part of the data when the form

is submitted. Arbitrary code can be associated with the button, but one of the

most common uses is to verify that all input elements are in the proper for 

mat before the form is submitted to the server. For instance, the following

would create a button where the user defined 

validateForm

 function would

be called whenever the button is activated.