Edit in JSFiddle


              
<div class="d shine"></div>
.d {
    width: 300px;
    height: 500px;
    background: #111;
}
.shine:before {
    content:"";
    position:absolute;
    width: 300px;
    height: 500px;
    background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(rgba(255, 255, 255, .15)), to(rgba(0, 0, 0, .25))), -webkit-gradient(linear, left top, right bottom, color-stop(0, rgba(255, 255, 255, 0)), color-stop(0.5, rgba(255, 255, 255, .1)), color-stop(0.501, rgba(255, 255, 255, 0)), color-stop(1, rgba(255, 255, 255, 0)));
    background: -moz-linear-gradient(top, rgba(255, 255, 255, .15), rgba(0, 0, 0, .25)), -moz-linear-gradient(left top, rgba(255, 255, 255, 0), rgba(255, 255, 255, .1) 50%, rgba(255, 255, 255, 0) 50%, rgba(255, 255, 255, 0));
    background: linear-gradient(top, rgba(255, 255, 255, .15), rgba(0, 0, 0, .25)), linear-gradient(left top, rgba(255, 255, 255, 0), rgba(255, 255, 255, .1) 50%, rgba(255, 255, 255, 0) 50%, rgba(255, 255, 255, 0));
}