bootstrap中datetimepicker只选择月份显示1899问题

直接修改bootstrap-datetimepicker.js中

update: function () {
            var date, fromArgs = false;
            if (arguments && arguments.length && (typeof arguments[0] === 'string' || arguments[0] instanceof Date)) {
                date = arguments[0];
                fromArgs = true;
            } else {
                //这里加了个判断，原来只有else部分，增加了对自定义格式的处理
                if (this.element.val().length == 6) {
                    date = this.element.val().substring(0, 4) + "-" + this.element.val().substring(4, 6) + "-01";
                } else {
                    date = (this.isInput ? this.element.val() : this.element.find('input').val()) || this.element.data('date') || this.initialDate;
                    if (typeof date == 'string' || date instanceof String) {
                        date = date.replace(/^\s+|\s+$/g, '');
                    }
                }
            }

            if (!date) {
                date = new Date();
                fromArgs = false;
            }

            this.date = DPGlobal.parseDate(date, this.format, this.language, this.formatType);

            if (fromArgs) this.setValue();

            if (this.date < this.startDate) {
                this.viewDate = new Date(this.startDate);
            } else if (this.date > this.endDate) {
                this.viewDate = new Date(this.endDate);
            } else {
                this.viewDate = new Date(this.date);
            }
            this.fill();
        }