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) {
		home_over = newImage("images/home-over.gif");
		biojustice_home_over = newImage("images/biojustice-over.gif");
		biodiversity_home_over = newImage("images/biodiversity-over.gif");
		calendar_home_over = newImage("images/calendar-over.gif");
		action_resources_home_over = newImage("images/action_resources-over.gif");
		action_home_over = newImage("images/action-over.gif");
		background_home_over = newImage("images/background-over.gif");
		registration_home_over = newImage("images/registration-over.gif");
		gallery_home_over = newImage("images/gallery-over.gif");
		preloadFlag = true;
	}
}