Include a redundant mechanism (such as keyboard input) if device dependent event handlers are used to invoke a script. The onMouseUp event handler should be paired and included in the same element with "onKeyPress".
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> <html lang="en"> <head> <title>aert1.0/9.3.1</title> </head> <body> <p onClick="blah"></p> </body> </html>
W3C WAI: http://www.w3.org/WAI//
HTML Techniques for WAI 1.0: http://www.w3.org/TR/WCAG10-HTML-TECHS/