function toggle() {
for (var i=0; i<arguments.length; i++){
var target = document.getElementById(arguments[i]);
if (target.style.display == 'none') {
    target.style.display = 'block';
} else {
    target.style.display = 'none';
}}}

function show() {
for (var i=0; i<arguments.length; i++){
var target = document.getElementById(arguments[i]);
    target.style.display = 'block';
}}

function hide() {
for (var i=0; i<arguments.length; i++){
var target = document.getElementById(arguments[i]);
    target.style.display = 'none';
}}