(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)

jQuery.preLoadImages("video-on.jpg", "images/");

$(document).ready(function() {
   
   if (jQuery().shadowbox) {
   	Shadowbox.init();
   }
   
   $('.video a img').mouseover(function(){
      $(this).attr("src", "images/video-on.jpg");
    }).mouseout(function(){
      $(this).attr("src", "images/video.jpg");
});
	
 });