css3的gradient

线性渐变：
-moz-linear-gradient( [<point> || <angle>,]? <stop>, <stop> [, <stop>]* )
-webkit-linear-gradient( [<point> || <angle>,]? <stop>, <stop> [, <stop>]* )
-o-linear-gradient( [<point> || <angle>,]? <stop>, <stop> [, <stop>]* )

background:-moz-linear-gradient(left 30deg,#ace,#f96);/*Mozilla*/
background:-webkit-linear-gradient(left,#ace,#f96);/*new gradient for Webkit*/
background:-o-linear-gradient(left,#ace,#f96); /*Opera11*/

径向渐变：
 -moz-radial-gradient([<bg-position> || <angle>,]? [<shape> || <size>,]? <color-stop>, <color-stop>[, <color-stop>]*);
 -webkit-radial-gradient([<bg-position> || <angle>,]? [<shape> || <size>,]? <color-stop>, <color-stop>[, <color-stop>]*);