Title of alert box

Question

i'm searching for how to change the title of an alert, a prompt or a confirm box. ex:
MY TITLE
text normal bla bla bla
i know how to make it but not how to change About:blank

Answer 1

alert(MY TITLE text normal bla bla bla)
x = prompt(MY TITLE text normal bla bla bla)
confirm(MY TITLE text normal bla bla bla)