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) {
		center_03_left_05_over = newImage("images/center_03-left_05_over.gif");
		center_03_left_06_over = newImage("images/center_03-left_06_over.gif");
		center_03_left_07_over = newImage("images/center_03-left_07_over.gif");
		center_03_left_08_over = newImage("images/center_03-left_08_over.gif");
		center_03_left_09_over = newImage("images/center_03-left_09_over.gif");
		center_03_left_10_over = newImage("images/center_03-left_10_over.gif");
		center_03_left_11_over = newImage("images/center_03-left_11_over.gif");
		center_03_left_12_over = newImage("images/center_03-left_12_over.gif");
		center_03_left_14_over = newImage("images/center_03-left_14_over.gif");
		
		left_05_over = newImage("images/left_05-over.jpg");
		left_06_over = newImage("images/left_06-over.jpg");
		left_07_over = newImage("images/left_07-over.jpg");
		left_08_over = newImage("images/left_08-over.jpg");
		left_09_over = newImage("images/left_09-over.jpg");
		left_10_over = newImage("images/left_10-over.jpg");
		left_11_over = newImage("images/left_11-over.jpg");
		left_12_over = newImage("images/left_12-over.jpg");
		left_13_over = newImage("images/left_13-over.jpg");
		left_14_over = newImage("images/left_14-over.jpg");
		center_09_over = newImage("images/center_09-over.jpg");
		preloadFlag = true;
	}
}