全系列IE下，select的标签不对，而且还有穿透现象。怎么解决？

                <div class="add_interface">
                    <div class="rule_name">
                        <h6>规则名称</h6>
                        <input type="text">                    
                    </div>
                    <div class="func">
                        <h6>规则作用</h6>
                        <select class="rule_func">
                            <option value="显隐">显隐</option>
                            <option value="排序">排序</option>
                        </select>    
                        <select class="func_show_hide">
                            <option value="显示">显示</option>
                            <option value="隐藏">隐藏</option>                        
                        </select>
                        <input class="func_index" type="text">
                    </div>
                    <div class="choose_weight">
                        <h6>规则权重</h6>
                        <input type="text">                    
                    </div>
                    <div class="add_buttonarea">
                        <span class="sure">确定</span>
                        <span class="cancel">取消</span>
                    </div>
                </div>

CSS代码如下

.add_interface {
  width: 270px;
  top: 50%;
  margin-top: -95px;
  left: 50%;
  margin-left: -135px;
  position: fixed;
  background: #0082ae;
  padding: 10px 10px;
  display: inline-block;
  vertical-align: middle;
  z-index: 119;
  display: none;
}
.add_interface select {
  font-family: "微软雅黑";
}
.add_interface h6 {
  margin-bottom: 2px;
  margin-top: 10px;
  font-weight: bold;
  color: #fff;
}
.add_interface .func .func_show_hide {
  margin-left: 15px;
}
.add_interface .func .func_index {
  width: 30px;
  height: 20px;
  display: none;
  margin-left: 15px;
  text-align: center;
}
.add_interface .choose_weight input {
  width: 30px;
  height: 20px;
  text-align: center;
}
.add_interface .add_buttonarea:after {
  content: "";
  clear: both;
  display: block;
}
.add_interface .add_buttonarea span {
  display: block;
  width: 46px;
  height: 20px;
  margin-right: 10px;
  margin-top: 10px;
  text-align: center;
  line-height: 20px;
  background: #56baae;
  color: #fff;
  border-radius: 20px;
  float: right;
}
.add_interface .add_buttonarea span:hover {
  cursor: pointer;
  background: #e563a1;
}

现象如图：

第二张图片鼠标移到显隐的字样上，鼠标指针变成输入的形式。。。怎么解决？

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h6{ cursor: default; }