var randno ;
var ran ;
randno = Math.random() ;
ran = Math.ceil(randno * 7) ;

if (ran == 1) {file = "00"}
if (ran == 2) {file = "01"}
if (ran == 3) {file = "02"}
if (ran == 4) {file = "03"}
if (ran == 5) {file = "04"}
if (ran == 6) {file = "05"}
if (ran == 7) {file = "06"}