function alter (from, newSource) {
			document[from].src = newSource;
		}
		if (document.images)
		{
			img1 = new Image();
			img2 = new Image();
			img3 = new Image();
			img4 = new Image();
			img5 = new Image();
			img6 = new Image();
			img7 = new Image();
			img1.src = "img/mm01.png";
			img2.src = "img/mm02.png";
			img3.src = "img/mm03.png";
			img4.src = "img/mm04.png";
			img5.src = "img/mm05.png";
			img6.src = "img/mm06.png";
			img7.src = "img/logoinv.png";
		}