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) {
		subNav = newImage("/images/nav/subNav.gif");
		subNavOn = newImage("/images/nav/subNavOn.gif");
		financingOn = newImage("/images/icons/financingOn.gif");
		preloadFlag = true;
	}
}

function zPopWindow(zURL,zName,xSize,ySize,zOptLevel) {
	// a zOptLevel value of 1 yields a window with no ornamentation, bars, menus etc
	// a zOptLevel value of 2 yields the same window as 1, but with scroll bars
	// a zOptLevel value of 3 (or nothing, or anything but 1 or 2) yields a window with full menus, etc
	W = screen.width;
	H = screen.height;
	if (!xSize) { xSize = W / 1.25; }
	if (!ySize) { ySize = H / 1.25; }
	if (!zName) { zName = "NewWindow"; }
	xPos = (W - xSize) / 2;
	yPos = (H - ySize) / 2;

	if (zOptLevel == 1) {
		var zWinOpts = 'height=' + ySize + ',width=' + xSize + ',left=' + xPos + ',top=' + yPos + 'screenX=' + xPos + ',screenY=' + yPos;
	} else if  (zOptLevel == 2) {
		var zWinOpts = 'height=' + ySize + ',width=' + xSize + ',scrollbars=yes,left=' + xPos + ',top=' + yPos + 'screenX=' + xPos + ',screenY=' + yPos;
    } else {
		var zWinOpts = 'height=' + ySize + ',width=' + xSize + ',resizable=yes,toolbar=yes,location=yes,directories=yes,status=yes,menubar=yes,scrollbars=yes,left=' + xPos + ',top=' + yPos + 'screenX=' + xPos + ',screenY=' + yPos;
	}

	var PopWin = window.open(zURL,zName,zWinOpts);

}