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) {
		navHome_over = newImage("images/navHome-over.gif");
		navProgram_over = newImage("images/navProgram-over.gif");
		navEvents_over = newImage("images/navEvents-over.gif");
		navRegist_over = newImage("images/navRegist-over.gif");
		navSponsors_over = newImage("images/navSponsors-over.gif");
		navAttract_over = newImage("images/navAttract-over.gif");
		preloadFlag = true;
	}
}

function preloadImages_fr() {
	if (document.images) {
		navHome_over = newImage("images/navHome-over_fr.gif");
		navProgram_over = newImage("images/navProgram-over_fr.gif");
		navEvents_over = newImage("images/navEvents-over_fr.gif");
		navRegist_over = newImage("images/navRegist-over_fr.gif");
		navSponsors_over = newImage("images/navSponsors-over_fr.gif");
		navAttract_over = newImage("images/navAttract-over_fr.gif");
		preloadFlag = true;
	}
}