button" class="btn btn-primary"  data-toggle="popover" data-placement="auto top" data-content="气泡提示">
                                气泡提示顶部
                            </button>
                            <button type="button" class="btn btn-primary"  data-toggle="popover" data-placement="auto bottom" data-content="气泡提示">
                                气泡提示底部
                            </button>
                            <button type="button" class="btn bt