window.addEvent('domready', function(){
	var alertMessage = "image access restricted";
	// disable right-clicks on images with custom message
	var imglist = $$('img');
	imglist.each(function(element) {
		element.addEvent('mousedown', function(event) {
			if (event.rightClick == true) { alert(alertMessage);
				event.stopPropagation;
				event.stop;
				return false;
				
			}
		});
	});
});