function ChoiseFolder(n) {
  if(n){ MM_showHideLayers('catalogs','','hide');
         MM_showHideLayers('makers','','show'); }
   else{ MM_showHideLayers('makers','','hide');
         MM_showHideLayers('catalogs','','show'); }
  return; }

function switchImage(imgName, imgSrc) {
  if (document.images) {
     if(imgSrc != "none") { document.images[imgName].src = imgSrc; }
    }
   return; }

function preloadImage(imgSrc) {
 var image = new Image();
     image.src = imgSrc;
 return; }