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) {
		pn23a_06_over = newImage("images/index/pn23a/pn23a_06-over.jpg");
		pn23a_07_over = newImage("images/index/pn23a/pn23a_07-over.jpg");
		pn23a_08_over = newImage("images/index/pn23a/pn23a_08-over.jpg");
		pn23a_10_over = newImage("images/index/pn23a/pn23a_10-over.jpg");
		pn23a_11_over = newImage("images/index/pn23a/pn23a_11-over.jpg");
		pn23a_12_over = newImage("images/index/pn23a/pn23a_12-over.jpg");
		pn23a_13_over = newImage("images/index/pn23a/pn23a_13-over.jpg");
		pn23a_14_over = newImage("images/index/pn23a/pn23a_14-over.jpg");
		pn23a_26_over = newImage("images/index/pn23a/pn23a_26-over.jpg");
		pn23a_30_over = newImage("images/index/pn23a/pn23a_30-over.jpg");
		pn23a_33_over = newImage("images/index/pn23a/pn23a_33-over.jpg");
		pn23a_36_over = newImage("images/index/pn23a/pn23a_36-over.jpg");
		pn23a_39_over = newImage("images/index/pn23a/pn23a_39-over.jpg");
		pn23a_42_over = newImage("images/index/pn23a/pn23a_42-over.jpg");
		preloadFlag = true;
	}
}