<script type="text/javascript">
                var reg = new RegExp('^[a-z _-]+$', 'ig'), ret;
                function validate(){
                    ret = false;

                    if($('#name').val() == ""){
                         $("#firstNameErrorMsg").html("Please enter your first name.");
                    }else if(!$('#name').val().match(reg)){
                        $("#firstNameErrorMsg").html("First name can only contain letters.");
                    }else{
                        $("#firstNameErrorMsg").html("OK");
                        ret = true;
                    }

                    return ret;
                }
        </script>