.container3 .list-question a img {
	/* filter: alpha(opacity=70) !important; */
       -moz-opacity: 0.5;
       filter: gray() alpha(opacity=50);
       opacity:0.5;
}
.container3 .list-question a:hover img,
.container3 .list-question a.active img {
	/* filter: alpha(opacity=100) !important; */
       -moz-opacity: 1.0;
       opacity: 1.0;
       filter: alpha(opacity=100);
}