function gebi(id) {return document.getElementById(id);}

function addHandler(object, event, handler, useCapture) {
	if (object.addEventListener) {
		object.addEventListener(event, handler, useCapture ? useCapture : false);
	} else if (object.attachEvent) {
		object.attachEvent('on' + event, handler);
	} else alert("Add handler is not supported");
}

function removeHandler(object, event, handler) {
	if (object.removeEventListener) {
		object.removeEventListener(event, handler, false);
	} else if (object.detachEvent) {
		object.detachEvent('on' + event, handler);
	} else alert("Remove handler is not supported");
}

function screenSize() {
	var w, h;
	w = (window.innerWidth ? window.innerWidth : (document.documentElement.clientWidth ? document.documentElement.clientWidth : document.body.offsetWidth));
	h = (window.innerHeight ? window.innerHeight : (document.documentElement.clientHeight ? document.documentElement.clientHeight : document.body.offsetHeight));
	return {w:w, h:h};
}