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<!DOCTYPE html> <html> <body> <form action="form_action.asp"> E-mail: <input type="email" id="myEmail" name="usremail"> <input type="submit"> </form> <p>Click the "Try it" button to allow multiple values (emails) for the email field on form submission.</p> <p><strong>Tip:</strong> Try to type in more than one email before and after you have clicked on the "Try it" button. Separate each email with a comma, like: mail@example.com, mail2@example.com.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { document.getElementById("myEmail").multiple = true; document.getElementById("demo").innerHTML = "The email field now accept multiple values."; } </script> </body> </html>