// JavaScript Document
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) {
		middle_01_over = newImage("images/middle_01-over.gif");
		middle_03_over = newImage("images/middle_03-over.gif");
		middle_05_over = newImage("images/middle_05-over.gif");
		middle_07_over = newImage("images/middle_07-over.gif");
		middle_15_middle_01_over = newImage("images/middle_15-middle_01_over.jpg");
		middle_17_middle_03_over = newImage("images/middle_17-middle_03_over.jpg");
		middle_19_middle_05_over = newImage("images/middle_19-middle_05_over.jpg");
		middle_19_middle_47_over = newImage("images/middle_19-middle_47_over.jpg");
		middle_21_middle_07_over = newImage("images/middle_21-middle_07_over.jpg");
		middle_43_over = newImage("images/middle_43-over.gif");
		middle_45_over = newImage("images/middle_45-over.gif");
		middle_47_over = newImage("images/middle_47-over.gif");
		middle_49_over = newImage("images/middle_49-over.gif");
		preloadFlag = true;
	}
}