#center{ width:600px; float:left;}
.button_left { float:left; width:40px;} 
.product{ width:600px; overflow:hidden;}
.product .pro_li { background:url(../images/background.png) no-repeat; height: 141px;margin: 5px 5px 0 6px;padding: 6px;width: 134px; border:1px solid #dfdfdf;}
.product img{ solid; display:block;}
.pro_li span {color: #000000;display: block;font-size: 12px;height: 36px;line-height: 18px; margin-top: 4px;text-align: center;}
.product li {float: left; height:141px;}
.product li a{ display:block;}
.button_right { width:40px; float:right;}
.r_max_w{ width:520px; overflow:hidden; zoom:1;}
.product ul {width: 520px;height: 160px;overflow: hidden;float:left;}