// getElementById(): obj = $(elementId);
function $aa(elementId) {
	return document.getElementById(elementId);
}

// onEvent: addEvent(element, 'event', function);
function addEvent(elementPtr, eventType, eventFunc) {
	if (elementPtr.addEventListener)
		elementPtr.addEventListener(eventType, eventFunc, false);
	else
		elementPtr.attachEvent('on' + eventType, eventFunc); 
}