没有ie7,但这是一个好的开始
background: -moz-linear-gradient(-45deg, rgba(150,150,150,0.2) 1%, rgba(80,80,50,0.5) 52%, rgba(20,20,20,0.8) 100%);
background: -webkit-gradient(linear, left top, right bottom, color-stop(1%,rgba(150,150,150,0.2)), color-stop(52%,rgba(80,80,50,0.5)), color-stop(100%,rgba(20,20,20,0.8)));
background: -webkit-linear-gradient(-45deg, rgba(150,150,150,0.2) 1%,rgba(80,80,50,0.5) 52%, rgba(20,20,20,0.8) 100%);
background: -o-linear-gradient(-45deg, rgba(150,150,150,0.2) 1%,rgba(80,80,50,0.5) 52%, rgba(20,20,20,0.8) 100%);
background: -ms-linear-gradient(-45deg, rgba(150,150,150,0.2) 1%,rgba(80,80,50,0.5) 52%, rgba(20,20,20,0.8) 100%);
background: linear-gradient(-45deg, rgba(150,150,150,0.2) 1%,rgba(80,80,50,0.5) 52%, rgba(20,20,20,0.8) 100%);
/* FF3.6+ */
/* Chrome,Safari4+ */
/* Chrome10+,Safari5.1+ */
/* Opera 11.10+ */
/* IE10+ */
/* W3C */