function changeform(id) {
    var value = document.getElementById(id).value;
    if(id == "message" && value == "type your message here")
        document.getElementById(id).value = '';
    if(id == "name" && value == "name")
        document.getElementById(id).value = '';
    if(id == "email" && value == "email")
        document.getElementById(id).value = '';
}