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