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

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 preloadNavImages(relToRoot) {
	if (relToRoot == null) {
		relToRoot = '';
	}
	if (document.images) {
		nav_interviews_over = newImage(relToRoot + "images/preview/nav/nav_interviews_over.gif");
		nav_pressinfo_over = newImage(relToRoot + "images/preview/nav/nav_pressinfo_over.gif");
		nav_aboutseries_over = newImage(relToRoot + "images/preview/nav/nav_aboutseries_over.gif");
		nav_programs_over = newImage(relToRoot + "images/preview/nav/nav_programs_over.gif");
		nav_promovideo_over = newImage(relToRoot + "images/preview/nav/nav_promovideo_over.gif");
		nav_credits_over = newImage(relToRoot + "images/preview/nav/nav_credits_over.gif");
		preloadFlag = true;
	}
}