window.alert() or alert()

alert() shows a message dialog:

 
<!DOCTYPE HTML> 
<html> 
    <head> 
        <title>Example</title> 
    </head> 
    <body> 
        <script type="text/javascript"> 
            alert("message");
        </script> 
    </body> 
</html>
Click to view the demo
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Window:
  1. The Window Object
  2. The Window Events
  3. window.alert() or alert()
  4. window.close()
  5. window.confirm() or confirm()
  6. window.find() displays find dialog
  7. window's outer width and height, inner height and width
  8. window.location
  9. window.moveBy(distance, distance)
  10. window.moveTo(x,y) moves the window to the upper-left coordinate
  11. window.open()
  12. window.print()
  13. window.prompt() and prompt()
  14. window.resizeTo(x,y) and window.resizeBy(xDelta,yDelta)
  15. window.scrollTo(x,y)
  16. window.screenLeft, window.screenX, window.screenTop, window.screenY
  17. window.setInterval() or setInterval()
  18. window.setTimeout() or setTimeout()
  19. Pop-up Blockers