function addEvent(obj, evType, fn) {
    if (obj.addEventListener) {
        obj.addEventListener(evType, fn, true);
        return true;
    } else if (obj.attachEvent) {
        var rv = obj.attachEvent("on"+evType, fn);
        return rv;
    } else {
        return false;
    }
}

function getElementWidth(elem) {
	xPos = elem.offsetWidth;
	return xPos;
}