.jg-image-grid div div img {
    position:absolute;
    left:0;
    -webkit-transition: opacity 1.5s ease-in-out;
    -moz-transition: opacity 1.5s ease-in-out;
    -o-transition: opacity 1.5s ease-in-out;
    transition: opacity 1.5s ease-in-out;
    opacity:0;
    -ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
    filter: alpha(opacity=0);
}
  
.jg-image-grid div div img.opaque {
    opacity:1;
    -ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=100)";
    filter: alpha(opacity=1);
}