function alert_me(){
	history.go(0);
	}
window.onresize=alert_me

function preloadImages() {
   if (document.images) {
      for (var i = 0; i < preloadImages.arguments.length; i++) {
         (new Image()).src = preloadImages.arguments[i];
      }
   }
}

preloadImages('images/shado2.gif','images/shado2.png','images/shado.gif');