.experts_container ul li a img {
    /*filter: url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\'><filter id=\'grayscale\'><feColorMatrix type=\'matrix\' values=\'0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0\'/></filter></svg>#grayscale");*/ /* Firefox 10+ */
    /*filter: gray;*/ /* IE6-9 */
    /*-webkit-filter: grayscale(100%);*/ /* Chrome 19+ & Safari 6+ */
    /*-webkit-transition: all .6s ease;*/ /* Fade to color for Chrome and Safari */
    /*-webkit-backface-visibility: hidden;*/ /* Fix for transition flickering */
}

.experts_container ul li a img:hover {
    /*filter: none;*/
    /*-webkit-filter: grayscale(0%);*/
}