bootstrap datetimepicker 选择月份 选择年

直接上代码：

//选择年月日的	   startView: 2,   minView: 2, format: 'yyyymmdd',
$('#datetimepicker').datetimepicker({
		format: 'yyyymmdd',
		 weekStart: 1,
         autoclose: true,
         startView: 2,
         minView: 2,
         forceParse: false,
         language: 'zh-CN'
	});

//选择年月的	   startView: 3,   minView: 3, format: 'yyyymm',
$('#datetimepicker').datetimepicker({
		format: 'yyyymm',
		 weekStart: 1,
         autoclose: true,
         startView: 3,
         minView: 3,
         forceParse: false,
         language: 'zh-CN'
	});

//选择年的	   startView: 4,   minView: 4, format: 'yyyy',
$('#datetimepicker').datetimepicker({
		format: 'yyyymm',
		 weekStart: 1,
         autoclose: true,
         startView: 4,
         minView: 4,
         forceParse: false,
         language: 'zh-CN'
	});

    <div class="col-md-7">
                 <div class='input-group date form_date' >
                    <input name="startTm" id="datetimepicker" type='text' class="form-control input-sm" readonly="readonly"/>
                    <span class="input-group-addon input-sm">
                      <span class="glyphicon glyphicon-calendar"></span>
                    </span>
                </div> 
   </div>

在这里遇到很多问题：什么日历图标没反映啊，输入框和日历图标对不齐啊，点日历图标把数据清了啊……都是样式问题，所以提供几种样式，一种一种试吧……博大精深啊……

<div class='input-group date form_date' data-date-format="yyyymmdd">
    <input name="startTm" id="startTm" type='text' class="form-control input-sm" readonly="readonly"/>
    <span class="input-group-addon input-sm">
      <span class="glyphicon glyphicon-calendar"></span>
    </span>
</div>

            <div class="date input-append"  id="datetimepicker">
                   <div class="input-group">
                    <input class="form-control input-sm" readonly="readonly" type="text">
                    <span class="add-on input-group-addon"><i class="icon-remove"></i></span>
                    <span class="add-on input-group-addon"><i class="icon-th"></i></span></div>
                  </div>