function Off (imageName) {
	if (document.images) {
		document[imageName].src = eval(imageName + "Off.src");
	}
}

function On (imageName) {
	if (document.images) {
		document[imageName].src = eval(imageName + "On.src");
	}
}

if (document.images) {
  newsOff  = new Image();
  newsOn = new Image();

  newsOff.src  = "news.gif";
  newsOn.src = "news_on.gif";

  featuresOff  = new Image();
  featuresOn = new Image();

  featuresOff.src  = "features.gif";
  featuresOn.src = "features_on.gif";

  specsOff  = new Image();
  specsOn = new Image();

  specsOff.src  = "specs.gif";
  specsOn.src = "specs_on.gif";

  downloadOff  = new Image();
  downloadOn = new Image();

  downloadOff.src  = "download.gif";
  downloadOn.src = "download_on.gif";

  demoOff  = new Image();
  demoOn = new Image();

  demoOff.src  = "demo.gif";
  demoOn.src = "demo_on.gif";

  linksOff  = new Image();
  linksOn = new Image();

  linksOff.src  = "links.gif";
  linksOn.src = "links_on.gif";
}