var b = new Array();
	b[0] = new Image(); b[0].src = "bilder/medi_arv_1.png";
	b[1] = new Image(); b[1].src = "bilder/medi_arv_2.png";
	b[2] = new Image(); b[2].src = "bilder/medi_arv_3.png";

	var i = 0;
	var speed = 750;
	function logoChange()
		{

		document.images.getupArv.src = b[i].src;
		i = i + 1;
        window.setTimeout("logoChange()",500);
        }