// JavaScript Document
function menuOn (menuItem) {
  menuElement = document.getElementById("fc_"+menuItem);
  menuElement.src = "images/interface/menu/"+menuItem+"-on.png";
}
function menuOff (menuItem) {
  menuElement = document.getElementById("fc_"+menuItem);
  menuElement.src = "images/interface/menu/"+menuItem+".png";
}