function preloadImages(){
	if(!document.PIMAGES){
		document.PIMAGES = [];
		n = arguments.length-1;
		for(var i=0;i<=n;i++){
			document.PIMAGES[i] = new Image();
			document.PIMAGES[i].src = arguments[i];
		}
	}
}
Event.observe(window,'load', function(){preloadImages('app/themes/default/images/logo.gif');});