Enter reloads the page? shut this modafaquin down.

$('body').on('keyup', function(e) { //monitora por enter na pag
     if (e.which === 13) {
         e.preventDefault();

     }
});
$('form').on('keyup', function(e) { //monitora por enter no form.
     if (e.which === 13) {
         e.preventDefault();
        $(this + ' input[type=submit]').trigger('click'); //reza pra achar o formulario no 'this' e da um submit
     }
});