function ChangeImage(imageId) {
  var image = document.getElementById(imageId);
  var bannerImage = document.getElementById('imgBanner');
  if (image != null){
    switch (imageId) {
      case "imgDownloads": 
        image.src = "http://dev.crocodile-communication.com/superglass/themes/superglass/images/jshead/downloads_button.gif";
        bannerImage.src = "http://dev.crocodile-communication.com/superglass/themes/superglass/images/jshead/download_head.jpg";
        break;
      case "imgGreenStory": 
        image.src = "http://dev.crocodile-communication.com/superglass/themes/superglass/images/jshead/green_button.gif";
        bannerImage.src = "http://dev.crocodile-communication.com/superglass/themes/superglass/images/jshead/green_head.jpg";
        break;
      case "imgRegulateStory": 
        image.src = "http://dev.crocodile-communication.com/superglass/themes/superglass/images/jshead/regulate_button.gif";
        bannerImage.src = "http://dev.crocodile-communication.com/superglass/themes/superglass/images/jshead/regulation_head.jpg";
        break;
    }
  }
}
function SetDefaults(imageId, defaultImagePath) {
  var image = document.getElementById(imageId);
  var bannerImage = document.getElementById('imgBanner');
  if (image != null){
    image.src = defaultImagePath;
    bannerImage.src = 'http://dev.crocodile-communication.com/superglass/themes/superglass/images/jshead/home1.jpg';
  }
}