How to detect if a dialog is present

In comp.lang.javascript message <k5htj5qq.fsf (AT) hotpop (DOT) com>, Sat, 17 May
2008 17:43:41, Lasse Reichstein Nielsen <lrn (AT) hotpop (DOT) com> posted:

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Lasse Reichstein Nielsen - lrn (AT) hotpop (DOT) com

That address, although in your header, sig, and Web site, still does not
work :

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

lrn (AT) hotpop (DOT) com
SMTP error from remote mail server after RCPT TO:<lrn (AT) hotpop (DOT) com>:
host mx1.hotpop.com [38.113.3.62]: 550 <lrn (AT) hotpop (DOT) com>:
Recipient address rejected: Account closed due to inactivity. No forwarding information is available.

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