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) {
		studioover = newImage("../images/new_header/studioover.gif");
		lightingover = newImage("../images/new_header/lightingover.gif");
		backgroundover = newImage("../images/new_header/backgroundover.gif");
		cameraover = newImage("../images/new_header/cameraover.gif");
		booksover = newImage("../images/new_header/booksover.gif");
		guideover = newImage("../images/new_header/guideover.gif");
		supportover = newImage("../images/new_header/supportover.gif");
		viewcartover = newImage("../images/new_header/viewcartover.gif");
		searchover = newImage("../images/new_header/searchover.gif");
		talktousover = newImage("../images/new_header/talktousover.gif");
		preloadFlag = true;
	}
}