//Per far funzionare protoslide si devono usare queste simpatiche funzioni $type(obj) e $clear(timer)

function $type(obj){
		if (obj == undefined) return false;
		if (obj.$family) return (obj.$family.name == 'number' && !isFinite(obj)) ? false : obj.$family.name;
		if (obj.nodeName){
			switch (obj.nodeType){
				case 1: return 'element';
				case 3: return (/\S/).test(obj.nodeValue) ? 'textnode' : 'whitespace';
			}
		} else if (typeof obj.length == 'number'){
			if (obj.callee) return 'arguments';
			else if (obj.item) return 'collection';
		}
		return typeof obj;
	};

	function $clear(timer){
		clearTimeout(timer);
		clearInterval(timer);
		return null;
	};