var photo=new Array()
var num=0
photo[0]="images/wws01.jpg"
photo[1]="images/wws02.jpg"
photo[2]="images/wws03.jpg"
photo[3]="images/wws04.jpg"
photo[4]="images/wws05.jpg"
photo[5]="images/wws06.jpg"
photo[6]="images/wws07.jpg"
photo[7]="images/wws08.jpg"
photo[8]="images/wws09.jpg"
photo[9]="images/wws10.jpg"
photo[10]="images/wws11.jpg"
photo[11]="images/wws12.jpg"
photo[12]="images/wws13.jpg"
photo[13]="images/wws14.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
  }
}