function getElement(name) {
	if(navigator.appName == "Netscape") {
		if(parseInt(navigator.appVersion) == 4) {
			target = document[name];
		} else {
			target = document.getElementById(name);
		}
	} else {
		target = document.all ? document.all[name] : null;
	}
	return target;
}

function swapImage(img, src) {
	img.org = img.src;
	img.src = src;
}

function restoreImage(img) {
	if(img.org) img.src = img.org;
}

function syncNav() {
	parent.tornadoNav.location = "navigation.html";
}

function popupWindow(url, target, width, height) {
	left = (screen.availwidth - width) / 2;
	down = (screen.availheight - height) / 2;
	window.open(url , target, "width=" + width + ",height=" + height +",left=" + left + ",top=" + down + ",toolbar=no,location=no,status=no,menubar=no,scrollbars=no");
}