The alert(message) method, when invoked, must show the
given message to the user. The user agent may make the
method wait for the user to acknowledge the message before returning; if
so, the user agent must pause while the method is
waiting.
The confirm(message) method, when invoked, must show the
given message to the user, and ask the user to respond
with a positive or negative response. The user agent must then pause as the the method waits for the user's response.
If the user response positively, the method must return true, and if the
user response negatively, the method must return false.
The prompt(message, default) method,
when invoked, must show the given message to the user,
and ask the user to either respond with a string value or abort. The user
agent must then pause as the the method waits for the
user's response. The second argument is optional. If the second argument
(default) is present, then the response must be
defaulted to the value given by default. If the user
aborts, then the method must return null; otherwise, the method must
return the string that the user responded with.
The print() method,
when invoked, should offer the user the opportunity to obtain a physical form of the document. The user agent
may make the method wait for the user to either accept or decline before
returning; if so, the user agent must pause while the
method is waiting. (This does not, of course, preclude the user agent from
always offering the user with the opportunity to convert the
document to whatever media the user might want.)
