Editar o código:
ver o resultado »
Tente você mesmo - ©
w3ii.com
<!DOCTYPE html> <html> <body> <p>When you submit the form, a function is triggered which alerts some text.</p> <form action="demo_form.asp" onsubmit="myFunction()"> Enter name: <input type="text" name="fname"> <input type="submit" value="Submit"> </form> <script> function myFunction() { alert("The form was submitted"); } </script> </body> </html>