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) {
		index_10_over = newImage("images/index_10-over.jpg");
		index_12_over = newImage("images/index_12-over.jpg");
		index_13_over = newImage("images/index_13-over.jpg");
		index_14_over = newImage("images/index_14-over.jpg");
		index_15_over = newImage("images/index_15-over.jpg");
		index_18_over = newImage("images/index_18-over.jpg");
		index_20_over = newImage("images/index_20-over.jpg");
		index_21_over = newImage("images/index_21-over.jpg");
		index_22_over = newImage("images/index_22-over.jpg");
		index_23_over = newImage("images/index_23-over.jpg");
		preloadFlag = true;
	}
}

// -->