.ball_w, .ball_b, .ball_p, .ball_g, .ball_y{margin:0.5em;width:7em;height:10em;border:0;position:relative;float:left;text-align:center;overflow:hidden;}
.ball_w{background:#FFF url('/m/bonusball/white.png') no-repeat top center;}
.ball_b{background:#FFF url('/m/bonusball/blue.png') no-repeat top center;}
.ball_p{background:#FFF url('/m/bonusball/pink.png') no-repeat top center;}
.ball_g{background:#FFF url('/m/bonusball/green.png') no-repeat top center;}
.ball_y{background:#FFF url('/m/bonusball/yellow.png') no-repeat top center;}
.number{color:#000;font-size:2em;font-weight:bold;margin:0.8em 0;}