Test Case xhtml1_wcag2_20050630_3.2_l2_sc3_021: Change of user agent - textarea onchange

Formal Metadata

Formal Metadata
TitleChange of user agent - textarea onchange
DescriptionDocument containing a textarea; when the textarea state changes a MIDI file is loaded with an external player.
CreatorBenToWeb (johannes.koch@…)
RightsCopyright BenToWeb 2004-2007

Technologies and Features

Technologies are markup languages or data formats. If the technology is a markup language, “features” refers to elements and attributes.

XHTML™ 1.0 The Extensible HyperText Markup Language (Second Edition)

XHTML™ 1.0 The Extensible HyperText Markup Language (Second Edition)

Feature: textarea (namespace: http://www.w3.org/1999/xhtml) .

Technical specification: http://www.w3.org/TR/1999/REC-html401-19991224/interact/scripts.html#adef-onchange.

Test Data


The test is intended to fail because a change in textarea state changes the user agent.

Test Modes

End user.

Test Files

Test file.


xhtml1_wcag2_20050630_3.2_l2_sc3_021 (XML).


“Rules” refer to success criteria in WCAG 2.0, checkpoints in WCAG 1.0 and similar requirements.

Primary Rules

The test case fails the following success criterion at line 9, column 138: http://www.w3.org/TR/2006/WD-WCAG20-20050630/#consistent-behavior-unpredictable-change.

Functional Outcome

Change of user agent onchange.

Technical Comment

The JavaScript in the onchange attribute causes the browser to load a resource, that the browser is not able to handle natively.