yeah a dialogue box works for me
However, the dialogue box was triggered after a certain time of viewing the page so I had some time to minimise my browser. Because i believe the os or browser won't cause the flashing notification if the user is in said window.
I dont know if it will work on the dock for mac. But for mac it would cause the browser's icon to bounce.
One thing that felgall might have been referring too, sorry if im speaking for you, here:
is that it may not work in every browser. Try safari, firefox, and (i just tried it in IE and it works)
wow saying I tried it in IE and it works feels weird :lol: because usually speciifc configurations have to be made for IE
Anywho, I hope I was of help. Ill post if I find anything
Edit: Just wondering I believe OP means the user with the original question, but what does it stand for?