*{margin:0;padding:0;border:0;}
a{text-decoration:none;cursor:pointer}
a:hover{text-decoration:underline}
li{list-style-type: none;}
.box{width:1000px;margin:0 auto;}
.left{float:left;dispaly:inline-block}
.right{float:right;dispaly:inline-block}
.clear{clear:both}