javascript window confirm( )

Displays a dialog box with a message and two clickable buttons. Script execution halts while the dialog box appears. One button indicates a Cancel operation; the other button indicates the user's approval (OK or Yes). The text of the buttons is not scriptable. The message should ask a question to which either button would be a logical reply. A click of the Cancel button returns a value of false; a click of the OK button returns a value of true.