bootstrap 点击窗口空白不消失（modal）

<div class="modal fade bs-example-modal-sm2" tabindex="-1" role="dialog"
aria-hidden="true" data-backdrop="static">
    <div class="table-responsive">
        <div class="modal-dialog modal-sm2">
            <div class="modal-content">
                <div class="modal-header">
                    <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                        <span aria-hidden="true">
                            ×
                        </span>
                    </button>
                    <h4 class="modal-title" id="myModalLabel2">
                        <label data-locale="i18n_wasteQuantity">
                            测试
                        </label>
                    </h4>
                </div>
                <div class="modal-body">
                    <div class="table-responsive">
                        <table class="table table-striped table-bordered">
                            <tbody id="wasteStatisticsContent">
                            </tbody>
                        </table>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-default" data-dismiss="modal">
                            <label data-locale="i18n_cancel">
                            </label>
                        </button>
                        <button type="button" class="btn btn-primary" data-dismiss="modal">
                            <label data-locale="i18n_sure" onclick="saveStrWasteNum()">
                            </label>
                        </button>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

注意：添加属性

data-backdrop="static"