*{margin:0;padding:0;border:0;}
       #div1{width:120px;height:auto;border:1px solid #000;position:fixed;top:200px;left:50px;}
       .nav{list-style:none;background:#888888;}
       .nav li{width:120px;height:30px;line-height:30px;border-bottom:1px dashed #ccc;text-align:center;color:#000;cursor:pointer;}
       .nav li:hover{color:#ee00ee;background:#fff;}
       #div2{width:100%;height:auto;}
       #div2 p{height:600px;}
       .top{background:#fff;}
       .red{background:red;}
       .yellow{background:yellow;}
       .blue{background:blue;}
       .green{background:green;}