tr {
	text-align:center;
   }

th {
	background-color:silver;
	color: black;
   }

.bg {
	background-color:white;
   }


tr:hover {
	background-color:red;
	color: white;
         }


.hover_image:hover {text-decoration: none} 
.hide {display:none}
.hover_image:hover img:first-child{display:none}
.hover_image:hover img:last-child{display:inline-block}