.www51buycom { width: 1000px; height: 420px; margin:0px auto; position: relative; overflow:hidden;padding:0px;}
.51buypic{ width: 1000px; height: 420px; float:left;  }
.www51buycom .num { overflow:hidden; height: 25px; position: absolute; bottom:12px; right: 15px;z-index:3 }
.www51buycom ul { list-style-type:none;padding:0px;margin:0px;}
.www51buycom .num li { width: 25px; height: 25px; line-height: 25px; text-align: center; font-family:"microsoft yahei", Arial; color: #FFFFFF; background: #444444;
margin-right: 10px; border-radius:50%; cursor:pointer; float: left; list-style-type:none;}
.www51buycom .num li.on { background: #FF0000; }
.www51buycom .prev,
.www51buycom .next { display: none; width: 40px; height: 100px; background: url(../img/btn.png) no-repeat; position: absolute; top: 155px;}
.www51buycom .prev { left: 0; }
.www51buycom .next { right: 0; background-position: right }