am_i is_ Functions

in tf_admin.php:

function tf_am_i_on_admin() {
// is this an admin page?

function tf_am_i_an_admin() {
// am i logged in as an admin?

function tf_am_i_martha() {
// am i logged in as martha?

function tf_is_an_admin($uid) {

function tf_am_i_an_editor() {
// am i logged in as an editor or higher?

function tf_hasrole($uid,$looking_for)