function showhidelayer(id, dis) { var s = document.getElementById(id).style; var num; s.display = (s.display == "block" ? "none" : "block"); s.display = dis; } function hideallbut(id){ numlayers=3; des = new Array(numlayers); des[0]="austate"; des[1]="nzstate"; des[2]="usstate"; for(i=0;i