Tryit Editor v1.8

Source Code:

<!DOCTYPE html>
<html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.1/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>

Result:

W3Schools.com - Try it yourself

Edit the code above and click "Submit Code" to see the result.