Messages and Confirmations

• We have already met the alert message is previous examples.
• Other Message types exist.

JavaScript provides three built-in window types:

prompt("string, string ")

: displays a simple window that contains a prompt and a textfield in which the user can enter data.

E.g. prompt("You are being prompted", "");

Figure: JavaScript prompt

prompt cont.

: The method a has two parameters:

• a text string defining the prompt message and
• a string to use as the default value.

  If you don't want to display a default then simply use an empty string.

confirm("string ")

: Shows a window containing a message and two buttons: OK and Cancel.

E.g. confirm("Please Confirm?");

Figure: JavaScript confirm

confirm cont.

:

• Cancel will abort any pending action,
• OK will let the action proceed.

Sample applications:

• When submitting form data, or
• possibly as the user tries to follow a link that leaves your site for another.

alert("string ")

: Displays the text string and an OK button.

E.g. alert("Are You Alert?");

Figure: JavaScript alert