function switchPhoto1(n)
{ 
var id;
  switch(n)
  {
    case 0:
         id = "";
         break;
    case 1:
         id = "photo1";
         break;
    case 2:
         id = "photo2";
         break;
	case 3:
         id = "photo3";
         break;
	case 4:
         id = "photo4";
         break;
	case 5:
         id = "photo5";
         break;
  } 
  document.getElementById('photo1').style.display = "none";
  document.getElementById('photo2').style.display = "none";
  document.getElementById('photo3').style.display = "none";
  document.getElementById('photo4').style.display = "none"; 
  document.getElementById('photo5').style.display = "none"; 
  if (id!="")
     document.getElementById(id).style.display = "block";
}