/* 
img {
   
  -webkit-filter: grayscale(1);  
  -webkit-box-shadow: 0px 2px 6px 2px rgba(0,0,0,0.75);
  -moz-box-shadow: 0px 2px 6px 2px rgba(0,0,0,0.75);
  box-shadow: 0px 2px 6px 2px rgba(0,0,0,0.75);
  margin-bottom:20px;
} */

img:hover {
  filter: none; /* IE6-9 */
  -webkit-filter: grayscale(0) !important; /* Google Chrome, Safari 6+ & Opera 15+ */
  opacity:0.8;
}