function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		gflyer_over 	= newImage("imgs/gflyer-over.jpg");
		gmenu_over 		= newImage("imgs/gmenu-over.jpg");
		glogo_over 		= newImage("imgs/glogo-over.jpg");
		gposter_over 	= newImage("imgs/gposter-over.jpg");
		gmagazine_over 	= newImage("imgs/gmagazine-over.gif");
		preloadFlag = true;
		changeImages('gflyer', 	'imgs/gflyer.jpg'); 
		changeImages('gmenu', 		'imgs/gmenu.jpg'); 
		changeImages('glogo', 		'imgs/glogo.jpg'); 
		changeImages('gposter', 	'imgs/gposter.jpg');
		changeImages('gmagazine', 	'imgs/gmagazine.gif'); 
		}
}