function newImage(arg) {
  	if (document.images) {
  		rslt = new Image();
  		rslt.src = arg;
  		return rslt;
  	}
  }
  
  function changeImages() {
  	if (document.images && (preloadFlag == true)) {
  		for (var i=0; i<changeImages.arguments.length; i+=2) {
  			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
  		}
  	}
  }
  
  var preloadFlag = false;
  function preloadImages() {
  	if (document.images) {
  		layout_01_biography_over = newImage("images/layout_01-biography_over.gif");
  		biography_discography_over = newImage("images/biography-discography_over.gif");
  		biography_over = newImage("images/biography-over.gif");
  		discography_over = newImage("images/discography-over.gif");
  		catalogue_over = newImage("images/catalogue-over.gif");
  		pressreleases_over = newImage("images/highlights-over.gif");
  		contact_over = newImage("images/contact-over.gif");
  		preloadFlag = true;
  	}
  }