效果圖：

、

css:

<style type="text/css">
/* 帶復(fù)選框的下拉框  */
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:

<div class="select_checkBox">
    <div class="chartQuota">
      <p>
        <a href="javascript:;" hidefocus="true" title="請選擇指標(biāo)"><span>選擇指標(biāo)</span>
          <b></b>
        </a>
      </p>
      
    </div><br>
    <div class="chartOptionsFlowTrend"">
        <ul>
          <li class=""><input type="checkbox" value="1"><span>瀏覽次數(shù)（PV）</span>
          </li>
          <li class=""><input type="checkbox" value="1"><span>獨立訪客（UV）</span>
          </li>
          <li class=""><input type="checkbox" value="1"><span>IP</span>
          </li>
          <li class=""><input type="checkbox" value="1"><span>新獨立訪客</span>
          </li>
          <li class=""><input type="checkbox" value="1"><span>訪問次數(shù)</span>
          </li>
        </ul>
        <p>
          <a href="javascript:;" title="確定" hidefocus="true" class="a_0">確定</a><a
            href="javascript:;" title="取消" hidefocus="true" class="a_1">取消</a>
        </p>
      </div>
  </div>

js：

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