function Wygaszanie(img,value,speed) {
		if (!img) img = this;
		if (!value) value = 0.3;
		if (!speed) speed = 1500;

		if (!img.style.opacity)
		img.style.opacity = 100;
		

		var timer = null,
		startTime = (new Date).getTime(),
		elapsed = null,
		d = null;

		timer = setInterval(function(){
			elapsed = (new Date).getTime() - startTime;

			if(elapsed < speed) {
				d = 1 - (elapsed / speed * value);
				img.style.opacity = d;
				
			}
			else {
				clearInterval(timer);
				img.style.opacity = 0;
				
			}
		},5);
	}