function switchImg(imgName, imgSrc) {
  document[imgName].src = imgSrc;
}
function iOn (obj) {
  //obj.style.backgroundImage='url(\'template/gfx/item_on.png\')';
  obj.style.color='#000000';
}

function iOff (obj) {
  //obj.style.backgroundImage='url(\'template/gfx/item_off.png\')';
  obj.style.color='#ffffff';
}
function lOn (obj) {
  obj.style.color='#000000';
}

function lOff (obj) {
  obj.style.color='#ffffff';
}