Apple.com reveal fx

reveal.css

body { background:url(http://images.apple.com/global/elements/quicktime/loading.gif) no-repeat 50% 150px; }
body.loaded { background:transparent; }

#showcase .content,
#promobar,
#itunes,
#globalfooter { opacity:0; -webkit-transition:opacity .5s; -moz-transition:opacity .5s; }

.loaded #showcase .content,
.loaded #promobar,
.loaded #itunes,
.loaded #globalfooter { opacity:1; }

.revealed #showcase .content { position:static; }

#showcase .content        { -webkit-transition-delay: .8s; -moz-transition-delay: .8s; }
#showcase .content.first  { -webkit-transition-delay: .9s; -moz-transition-delay: .9s; }
#showcase .content.second { -webkit-transition-delay:1s  ; -moz-transition-delay:1s  ; }
#showcase .content.third  { -webkit-transition-delay:1.1s; -moz-transition-delay:1.1s; }
#promobar { -webkit-transition-delay:1.6s; -moz-transition-delay:1.6s; }
#itunes { -webkit-transition-delay:1.7s; -moz-transition-delay:1.7s; }
#globalfooter { -webkit-transition-delay:1.8s; -moz-transition-delay:1.7s; }

.canceled #showcase .content,
.canceled #promobar,
.canceled #itunes,
.canceled #globalfooter { -webkit-transition:none; -moz-transition:none; }

reveal.js

if (typeof(AC) == "undefined") {
  AC = {}
}
AC.Reveal = {
  loaded: function (a) {
    window.setTimeout(function () {
      document.body.addClassName("loaded")
    }, 10)
  },
  revealed: function (a) {
    if (a.target.id == "globalfooter") {
      document.body.addClassName("revealed");
      window.removeVendorEventListener("transitionEnd", AC.Reveal.revealed, false)
    }
  },
  cancel: function (a) {
    if (typeof window.addEventListener == "function") {
      window.removeEventListener("load", AC.Reveal.loaded, false)
    }
    window.removeVendorEventListener("transitionEnd", AC.Reveal.revealed, false);
    document.body.addClassName("loaded");
    document.body.addClassName("revealed");
    document.body.addClassName("canceled")
  }
};
if (typeof window.addEventListener == "function") {
  window.addEventListener("load", AC.Reveal.loaded, false)
}
window.addVendorEventListener("transitionEnd", AC.Reveal.revealed, false);
window.setTimeout(AC.Reveal.cancel, 3000);
document.fire("ac:reveal:load");