Javascript: Preloading images

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/**
 * [ Preloading images is useful: Instead of loading an image when the user request it, 
 * we preload them in the background so they are ready to be displayed. Doing so in jQuery 
 * is very simple, as shown below:]
 * Source: http://engineeredweb.com/blog/09/12/preloading-images-jquery-and-javascript
 * @param  {[type]} $
 * @return {[type]}
 */
(function($) {
  var cache = [];
  // Arguments are image paths relative to the current page.
  $.preLoadImages = function() {
    var args_len = arguments.length;
    for (var i = args_len; i--;) {
      var cacheImage = document.createElement('img');
      cacheImage.src = arguments[i];
      cache.push(cacheImage);
    }
  }

jQuery.preLoadImages("image1.gif", "/path/to/image2.png");