处理浏览器默认样式

     html, body, ul, li, ol, dl, dd, dt, p, h1, h2, h3, h4, h5, h6, form, fieldset,          legend, img { margin:0; padding:0; }
     fieldset, img { border:none; } 
     img{display: block;}
     ul, ol { list-style:none; }
     input { padding-top:0; padding-bottom:0; font-family: "SimSun","宋体";}
      select, input, textarea { font-size:12px; margin:0; }
     textarea { resize:none; }
     table { border-collapse:collapse; }
     body {font-size:12px; color:#333;}
     .clearfix:after { content:"."; display:block; height:0; visibility:hidden; clear:both; }
     .clearfix { zoom:1; }
     a { color:#333; text-decoration:none; }
     a:hover { color:#666; text-decoration:none; }