Get your own website Result Size: 625 x 565
x
 
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
  $("form").submit(function(){
    alert("Submitted");
  });
  $("button").click(function(){
    $("form").submit();
  });  
});
</script>
</head>
<body>
<form action="">
  First name: <input type="text" name="FirstName" value="Mickey"><br>
  Last name: <input type="text" name="LastName" value="Mouse"><br>
</form> 
<button>Trigger submit event</button>
</body>
</html>