function roomCommercial1_onClick()
{
  document.getElementById('photo-room-commercial1').style.display = "block";
  document.getElementById('photo-room-commercial2').style.display = "none";
  document.getElementById('photo-room-commercial3').style.display = "none"; 
}

function roomCommercial2_onClick()
{
  document.getElementById('photo-room-commercial1').style.display = "none";
  document.getElementById('photo-room-commercial2').style.display = "block";
  document.getElementById('photo-room-commercial3').style.display = "none"; 
}

function roomCommercial3_onClick()
{
  document.getElementById('photo-room-commercial1').style.display = "none";
  document.getElementById('photo-room-commercial2').style.display = "none";
  document.getElementById('photo-room-commercial3').style.display = "block"; 
}