input[type="submit"] {
   color:green;
}

$('input[type="submit"]').css("color","green");

$(function() {
    $('input[type="submit"]').css("color","green");
});

input[type="submit"]{
        color: green;
        cursor: pointer;
        font: bold 12px Helvetica,Arial,sans-serif;
    }

$('#submit_id/.submit_class').css("color","green");