隐藏 select 边框和三角

<style type="text/css">
.DivSelect{
position: relative;
background-color: transparent;
width:  140px;
height: 17px;
overflow: hidden;
border-width:0px;
border-top-style: none;
border-right-style: none;
border-left-style: none;
border-bottom-style: none;}

.SelectList{
position: relative;
background-color: transparent;
TOP:   -2px;
left:-2px;
border-width: 0px;
border-top-style: none;
border-right-style: none;
border-left-style: none;
border-bottom-style: none;
width:160px;
display:block;
height: 18px;
overflow:hidden;}

#dictDIv{width:170px;}
</style>

<div class="DivSelect">
<dict:DictSelectTag dmlb="SBLX" name="sbxxEntity.sblx" id="sblxbh" value="${sbxxEntity.sblx}" styleClass="SelectList" />
</div>