Are system error messages blocked by pop-up blockers?

[suzanne]

Hi,

Does anyone know if system error messages (that are often used to communicate when there are errors in forms) are blocked by pop-up blockers?

Any info / advice would be much appreciated.

Thanks.

Suzanne

[tedster]

Are you talking about javascript alert messages? I haven't seen those being blocked, but I suppose it's possible in some configuration of some program -- there's a ton of those blockers out there these days.

[CritterNYC]

Don't forget that you can't even be sure that the client browser has Javascript turned on. So, if you're doing validation, it's best to check it serverside as well and respond with the appropriate message in-page.