function swap(img) {
    if (img.src.indexOf(".on") > -1) {
        img.src = img.src.replace(/\.on/, ".off");
    }
    else {
        img.src = img.src.replace(/\.off/, ".on");
    }
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  if (window.screen && (screen.width < 1024 || screen.height < 768)) {
    var ret = confirm("To view the tour or video properly, please set your screen resolution to 1024 x 768.  Press Cancel to set your resolution or press OK to continue with the tour.");
    if (!ret) return false;
  }
  window.open(theURL, winName, features);
  return false;
}