效果图：

css代码：

<style type="text/css">  
/* 带复选框的下拉框 */ 
ul li{  list-style: none;  padding:0px;  margin: 0px;  }    
.select_checkBox{  border:0px solid red;  position: relative;  display:inline-block;      }  
.chartQuota{  height:23px;  float:left;  display:inline-block;  border:0px solid black;  position: relative;  }    
.chartOptionsFlowTrend{  z-index:300;  background-color:white;  border:1px solid gray;  display:none;  position: absolute;  left:0px;  top:23px;  width:150px;  } 
 .chartOptionsFlowTrend ul{  float:left;  padding: 0px;  margin: 5px;  }  
.chartOptionsFlowTrend li{  /* float:left; */ display:block;  position: relative;  left:0px;  margin: 0px;  clear:both;  } 
 .chartOptionsFlowTrend li *{  float:left;  }  a:-webkit-any-link {  color: -webkit-link;  text-decoration: underline;  cursor: auto;  }  
.chartQuota p a {  float: left;  height: 21px;  outline: 0 none;  border: 1px solid #ccc;  line-height: 22px;  padding: 0 5px;  overflow: hidden;  background: #eaeaea;  color: #313131;  text-decoration: none;  }    
.chartQuota p {  margin:0px;  folat:left;  overflow: hidden;  height: 23px;  line-height:24px;  display: inline-block;  }  
.chartOptionsFlowTrend p {  height: 23px;  line-height: 23px;  overflow: hidden;  position: relative;  z-index: 2;  background: #fefbf7;  padding-top: 0px;  display: inline-block;  }  
.chartOptionsFlowTrend p a {  border: 1px solid #fff;  margin-left: 15px;  color: #2e91da;  }  
</style> 

html代码：

<div class="select_checkBox">
  <div class="chartQuota">
  <p> 
 <a href="javascript:;" hidefocus="true" title="请选择指标"><span>选择指标</span>
  <b></b>
  </a>
  </p>
    </div><br> 
 <div class="chartOptionsFlowTrend"">
  <ul>
  <li class=""><input type="checkbox" value="1"><span>浏览次数（PV）</span>  </li> 
 <li class=""><input type="checkbox" value="1"><span>独立访客（UV）</span>  </li>
  <li class=""><input type="checkbox" value="1"><span>IP</span>  </li>
  <li class=""><input type="checkbox" value="1"><span>新独立访客</span>  </li>
  <li class=""><input type="checkbox" value="1"><span>访问次数</span>  </li>
  </ul>  
<p>  <a href="javascript:;" title="确定" hidefocus="true" class="a_0">确定</a><a href="javascript:;" title="取消" hidefocus="true" class="a_1">取消</a>  </p> 
 </div>  
</div>

js代码：

<script type="text/javascript">  
$(function(){  $(".select_checkBox").hover(function(){  
$(".chartOptionsFlowTrend").css("display","inline-block");  },function(){  
$(".chartOptionsFlowTrend").css("display","none");  }); 
 });  
</script>