Button doesn't work in php with jQuery

my button doesn't work when I click on it nothing happens. This is my HTMl for it:

<button id="testbutton" name="testbutton" value="abgesendet2" type="button">test</button>

and this is my jQuery for it (the button is in a form):

<script> 
        jQuery('document').ready(function(){

            $("#myform").on('click', '#testbutton', function(){
                alert("test");
            });

        });
    </script>