background-image: linear-gradient( top, rgb(138, 138, 138) 0, rgb(102, 102, 102) 50%, rgb( 36, 36, 36) 50%, rgb( 0, 0, 0) 100% ); background-image: -moz-linear-gradient( top, rgb(138, 138, 138) 0, rgb(102, 102, 102) 50%, rgb( 36, 36, 36) 50%, rgb( 0, 0, 0) 100% ); background-image: -webkit-gradient( linear, left top, left bottom, color-stop( 0, rgb(138, 138, 138)), color-stop(0.5, rgb(102, 102, 102)), color-stop(0.5, rgb( 36, 36, 36)), color-stop(1.0, rgb( 0, 0, 0)) );
Requirements: Firefox 3.6 Beta 3+, Safari 4+ or Chrome 4+.