function WM_preloadImages()
{
/*
WM_preloadImages()
Loads images into the browser's cache for later use.

Source: Webmonkey Code Library
(http://www.hotwired.com/webmonkey/javascript/code_library/)

Author: Nadav Savio
Author Email: nadav@wired.com

Usage: WM_preloadImages('image 1 URL', 'image 2 URL', 'image 3 URL', ...);
*/

  // Don't bother if there's no document.images
  if (document.images)
  {
    if (typeof(document.WM) == 'undefined')
	{
      document.WM = new Object();
    }
    document.WM.loadedImages = new Array();
    // Loop through all the arguments.
    var argLength = WM_preloadImages.arguments.length;
    for(arg=0; arg<argLength; arg++) {
      // For each arg, create a new image.
      document.WM.loadedImages[arg] = new Image();
      // Then set the source of that image to the current argument.
      document.WM.loadedImages[arg].src = WM_preloadImages.arguments[arg];
    }
  }
}

function WM_imageSwap(daImage, daSrc)
{
/*
WM_imageSwap()
Changes the source of an image.

Source: Webmonkey Code Library
(http://www.hotwired.com/webmonkey/javascript/code_library/)

Author: Shvatz
Author Email: shvatz@wired.com

Usage: WM_imageSwap(originalImage, 'newSourceUrl');

Requires: WM_preloadImages() (optional, but recommended)
Thanks to Ken Sundermeyer (ksundermeyer@macromedia.com) for his help
with variables in ie3 for the mac.
*/

  var objStr, obj;

  // Check to make sure that images are supported in the DOM.
  if (document.images)
  {
    // Check to see whether you are using a name, number, or object
    if (typeof(daImage) == 'string')
	{
      // This whole objStr nonesense is here solely to gain compatability
      // with ie3 for the mac.
      objStr = 'document.' + daImage;
      obj = eval(objStr);
      obj.src = daSrc;
    }
	else if ((typeof(daImage) == 'object') && daImage && daImage.src)
	{
      daImage.src = daSrc;
    }
  }
}