【报Bug】mui-button-row多个button设置style.display后不在同一行了

    <div class="mui-button-row">  
        <button id="orderadd" type="button" class="mui-btn mui-btn-primary" onclick="return false;">新增</button>  
        <button id="ordersave" type="button" class="mui-btn mui-btn-primary" onclick="return false;">保存</button>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  
        <button id="ordercancel" type="button" class="mui-btn mui-btn-danger" onclick="return false;">取消</button>  
    </div>  

运行中设置style.display后不在同一行显示：
if(recostatus=="00"){
document.getElementById("ordersave").style.display = "block";
document.getElementById("orderadd").style.display = "none";
}else{
document.getElementById("orderadd").style.display = "block";
document.getElementById("ordersave").style.display = "none";
}