.chaletbtn {
position: absolute;
bottom: 5px;
right: 10px;
}
.chaletimg {
    display: inline;
}
#imggallery {
    position: relative;
}

#imggallery img {
  -webkit-transition: .5s ease;
  transition: .5s ease;
}

#imggallery button {
  position: absolute;
  top: -5px;
  right: 10px;
  opacity: 0;
  -webkit-transform-style: .5s ease;
          transform-style: .5s ease;
}

#imggallery:hover img, #imggallery.focus img {
  opacity: 0.8; 
}

#imggallery:hover button, #imggallery.focus button {
  opacity: 0.8; 
}