// Image Preloading
(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)

function changeBackground(filename) {
	$('#backgroundImage').fadeOut('slow', 
		function() {
			$('#backgroundImage').attr('src', filename).fadeIn('slow');
		}
	);
	return false;
}