var num=1
  img1 = new Image ()
  img1.src = "images/ani1.jpg"
  img2 = new Image ()
  img2.src = "images/ani2.jpg"
  img3 = new Image ()
  img3.src = "images/ani3.jpg"  
  img4 = new Image ()
  img4.src = "images/ani4.jpg"
  img5 = new Image ()
  img5.src = "images/ani5.jpg"
  


 function slideshowUp()
  {
   num=num+1
   if (num==6)
    {num=1}
 document.mypic.src=eval("img"+num+".src")
   }


 function slideshowBack()
  {
   num=num-1
   if (num==0)
    {num=5}
 document.mypic.src=eval("img"+num+".src")
   }