<div class="main">

      <span style="font-size:12px;"><dl class="hotsearch" style="width:300px;">

      <dt>热门搜索</dt>

      <dd><a href="#" target="_blank" ref="nav" class="w3">电视机</a></dd>

      <dd><a href="#" target="_blank" ref="nav" class="w4">性感漂亮</a></dd>

      <dd><a href="#" target="_blank" ref="nav" class="w3">高跟鞋</a></dd>

      <dd><a href="#" target="_blank" ref="nav" class="w2">手机</a></dd>

      <dd><a href="#" target="_blank" ref="nav" class="w2">对齐</a></dd>

      <dd><a href="#" target="_blank" ref="nav" class="w3">牛仔裤</a></dd>

      <dd><a href="#" target="_blank" ref="nav" class="w4">小家碧玉</a></dd>

      <dd><a href="#" target="_blank" ref="nav" class="w2">家居</a></dd>

      </dl></span>

    </div>

  <style type="text/css">

    .hotsearch dd{

      float: left;

      line-height: 24px;

      margin-right: 30px;

      overflow: hidden;

      text-align: center;

      width: 4em; /*这个值是看最长能显示几个文字，如x，则为x em*/

    }

    .hotsearch dd a{

      display:block;

    }

    .w2{

      letter-spacing:2em; /*如果需要y个字两端对齐，则为(x-y)/(y-1),这里是（4-2）/(2-1)=2em */

      margin-right:-2em; /*同上*/

    }

    .w3{

      letter-spacing:0.5em; /*如果需要y个字两端对齐，则为(x-y)/(y-1),这里是（4-3）/(3-1)=0.5em */

      margin-right:-0.5em; /*同上*/

    }

    </style>