var photo=new Array()
var num=0
photo[0]="images/hillbilly01.jpg"
photo[1]="images/hillbilly02.jpg"
photo[2]="images/hillbilly03.jpg"
photo[3]="images/hillbilly04.jpg"
photo[4]="images/hillbilly05.jpg"
photo[5]="images/hillbilly06.jpg"
photo[6]="images/hillbilly07.jpg"
photo[7]="images/hillbilly08.jpg"
photo[8]="images/hillbilly09.jpg"
photo[9]="images/hillbilly10.jpg"
photo[10]="images/hillbilly11.jpg"
photo[11]="images/hillbilly12.jpg"
photo[12]="images/hillbilly13.jpg"
photo[13]="images/hillbilly14.jpg"
numero=num+1

function precedente() {
  if (num>0) {
    num--
      document.image.src=photo[num];
    numero=num+1
  }
}
function suivante() {
  if(num<photo.length-1) {
    num++
      document.image.src=photo[num];
    numero=num+1
  }
}