Javascript [Electronic resources] : The Definitive Guide (4th Edition) نسخه متنی

Availability

JavaScript 1.0

Synopsis

window.confirm(question)

Arguments

question

The plain text (not HTML) string to be displayed in the dialog box.
It should generally express a question you want the user to answer.

Returns

true if the user clicks the

OK button; false if the
user clicks the

Cancel button.

Description

The
confirm( ) method displays the specified
question in a dialog box that pops up over
window. The appearance of the dialog box
is platform-dependent, but it generally contains graphics that
indicate that the user is being asked a question. The dialog box
contains

OK and

Cancel buttons that the user can use to answer
the question. If the user clicks the

OK button, confirm( )
returns true. If the user clicks

Cancel , confirm( ) returns
false.

The dialog box that is displayed by the confirm( )
method is

modal -- that is, it blocks all
user input to the main browser window until the user dismisses the
dialog box by clicking on the

OK or

Cancel buttons. Since this method
returns a value depending on the user's response to the dialog
box, JavaScript execution pauses in the call to confirm(
), and subsequent statements are not executed until the
user responds to the dialog box.

Usage

Note that the question displayed in the
dialog box is a string of plain text, not formatted HTML. You can use
the newline character, "\n", in your strings to break
your question across multiple lines. You can also do some rudimentary
formatting using spaces and can approximate horizontal rules with
underscore characters, but the results depend greatly on the font
used in the dialog box and thus are system-dependent.

Also, there is no way to change the labels that appear in the buttons
of the dialog box (to make them read

Yes and

No ,
for example). Therefore, you should take care to phrase your question
or message in such a way that

OK and

Cancel are suitable responses.

See Also

Window.alert( ), Window.prompt( )