WCAG 1.0 Double A Checkpoint 7.2

Skip Quick Links

“Until user agents allow users to control blinking, avoid causing content to blink (i.e., change presentation at a regular rate, such as turning on and off).”

Blinking or flashing content should be avoided if at all possible. This isn't 1999 and it's generally considered cheesy now.

Checkmark icon Note: The BLINK and MARQUEE elements are not defined in any W3C HTML specification and should not be used.

Reference

Scripts That Cause Movement and Blinking