select选择标签自定义下拉按钮

<select>
<option value="" disabled selected style="display:none;">请选择时间</option>
</select>

select::-ms-expand { display: none; }      //兼容ie隐藏
select{
	 appearance: none;
    -moz-appearance: none;
    -webkit-appearance: none;
    background: url(../images/go.png) no-repeat scroll 386px center transparent;
}