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<!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>