alt
attributes on images used as submit buttonsApplies to content using image-based submit buttons.
This technique relates to:
For input elements of type 'image', the alt
attribute of the
input
element is used to provide a functional label. This label indicates
the button's function, but does not attempt to describe the image. The label is
especially important if there are multiple submit buttons on the page that each lead to
different results.
The input
element is used to create many kinds of form controls. Although
the HTML and XHTML DTDs permits the alt
attribute on all of these, it should be used
only on image submit buttons. User agent support for this attribute on other types of
form controls is not well defined, and other mechanisms are used to label these
controls.
An input
element with an alt
attribute
Example Code:
<form action="http://example.com/prog/text-read" method="post">
<input type="image" name="submit" src="button.gif" alt="Submit" />
</form>
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For all input
elements that have a type attribute value of "image", check for
the presence of an alt
attribute.
Check that the alt
attribute indicates the
button's function.
#1 and #2 are true
If this is a sufficient technique for a success criterion, failing this test procedure does not necessarily mean that the success criterion has not been satisfied in some other way, only that this technique has not been successfully implemented and can not be used to claim conformance.
Techniques are informative—that means they are not required. The basis for determining conformance to WCAG 2.0 is the success criteria from the WCAG 2.0 standard—not the techniques. For important information about techniques, please see the Understanding Techniques for WCAG Success Criteria section of Understanding WCAG 2.0.