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) {
		title_04_title_11_over = newImage("images/title_04-title_11_over.gif");
		title_06_title_11_over = newImage("images/title_06-title_11_over.gif");
		title_11_over = newImage("images/title_11-over.jpg");
		title_12_over = newImage("images/title_12-over.jpg");
		title_13_over = newImage("images/title_13-over.jpg");
		title_14_over = newImage("images/title_14-over.jpg");
		title_15_over = newImage("images/title_15-over.jpg");
		preloadFlag = true;
	}
}