li{ list-style:none;}
/*本例css*/
.www51buycom { width: 503px; height: 180px; position: relative; overflow:hidden; }

/*数字按钮样式*/
.www51buycom .num { overflow:hidden; height: 20px; position: absolute; bottom:10px; right: 10px; zoom:1; z-index:3 }
.www51buycom .num li { width: 20px; height: 20px; line-height: 20px; text-align: center; font-weight: 400; color: #FFFFFF; background: #444444; cursor:pointer; float: left; }
.www51buycom .num li.on { background: #FF7700; } /*当前项*/
.51buypic li a img{ max-width:503px; max-height:180px;}
/*上一个  下一个*/
.www51buycom .prev,
.www51buycom .next { display: none; width: 40px; height: 100px; background: url(../images/btn.png) no-repeat; position: absolute; top: 115px;}
.www51buycom .prev { left: 0; }
.www51buycom .next { right: 0; background-position: right }