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<!DOCTYPE html> <html> <body> <form action="demo_form.asp" method="get"> Pick a number between 2 and 5: <input type="number" id="myInput" name="quantity" min="2" max="5"> <input type="submit" value="Submit"> </form> <p>If you submit the form with a number that is less than 2 or greater than 5, an alert message will occur.</p> <p><strong>Note:</strong> The oninvalid event is not supported in Internet Explorer 9 and earlier or Safari.</p> <script> document.getElementById("myInput").addEventListener("invalid", myFunction); function myFunction() { alert("You must pick a number between 2 and 5. You chose: " + this.value); } </script> </body> </html>