.abg-container { position:absolute; top:0; left:0; width:100%; height:100%; }
.abg-container .abg-img { position:absolute; height:100%; overflow:hidden; }
.abg-container .abg-img img { position:absolute; top:0px; left:0px; }
.abg-container .abg-img .abg-overlay
{
    position:absolute; top:0; left:0; width:100%; height:100%;

    background: -moz-radial-gradient(center, ellipse cover,  rgba(0,0,0,0.35) 0%, rgba(0,0,0,0.8) 100%); /* FF3.6-15 */
    background: -webkit-radial-gradient(center, ellipse cover,  rgba(0,0,0,0.35) 0%,rgba(0,0,0,0.8) 100%); /* Chrome10-25,Safari5.1-6 */
    background: radial-gradient(ellipse at center,  rgba(0,0,0,0.35) 0%,rgba(0,0,0,0.8) 100%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#59000000', endColorstr='#cc000000',GradientType=1 ); /* IE6-9 fallback on horizontal gradient */
}
.abg-container .abg-debug { top:0;left:0;border:dotted 1px yellow;position: absolute;background-color: rgba(0,255,0,0.5); }