function addEvent(objThis, eventThis, functionThis) { 
	if (objThis.addEventListener) { 
		objThis.addEventListener(eventThis,functionThis,true);
		return true;
	} else if (objThis.attachEvent) return objThis.attachEvent('on' + eventThis, functionThis);
	else return false;
}

function addClass(object, className) {
	if ( !object ) return;

	var classFind = new RegExp('\\b' + className + '\\b');
	if ( !object.className.match(classFind) ) object.className += ' ' + className;
}

function removeClass(object, className) {
	if ( !object ) return;

	var classFind = new RegExp('\\b' + className + '\\b');
	object.className = object.className.replace(classFind, ' ');
}