// addEvent function found at http://www.scottandrew.com/weblog/articles/cbs-events
function addEvent(obj, evType, fn) {
    if (obj.addEventListener) {
	obj.addEventListener(evType, fn, true);
	return true;
    } else if (obj.attachEvent) {
	var r = obj.attachEvent("on"+evType, fn);
	return r;
    } else {
	return false;
    }
}