| <!doctype html> | |
| <title>Prompt on form submit</title> | |
| <script> | |
| addEventListener("beforeunload", | |
| function(e) {e.preventDefault()}, | |
| false); | |
| </script> | |
| <p>When clicking the button below, you should get a prompt asking if you want to unload the document</p> | |
| <form method="get" action="next.html"> | |
| <input type="submit" value="Click here"> | |
| </form> |