快捷日期实现

快捷日期实现方法：

1.时间戳（timestamp）

<script type="text/javascript">
        $(document).ready(function() {
            getTime(dataChange('lastYear1'));
            generateReport();
        });
        
        function getTime(now){
            $("#c10").val(now.beginTime);
            $("#c11").val(now.endTime);
        }
                
        function dataChange(part) {
            var beginTime;
            var now = new Date();
            var timestamp = Date.parse(now);
            var month = now.getMonth();
            var year = now.getFullYear();
            var day = now.getDate();
            switch (part) {
            case 'lastMonth1':
                now.endTime = timeStamp2String(now);
                now.beginTime = timeStamp2String(timestamp-30*24*60*60*1000);
                break;
            case 'lastMonth3':
                now.endTime = timeStamp2String(now);
                now.beginTime = timeStamp2String(timestamp-30*3*24*60*60*1000);
                break;
            case 'lastYear1':
                unsetTime(now);
                now.endTime = timeStamp2String(now);
                now.setFullYear(year - 1, month, day);
                now.beginTime = timeStamp2String(now);
                break;
            case 'lastYear2':
                unsetTime(now);
                now.endTime = timeStamp2String(now);
                now.setFullYear(year - 2, month, day);
                now.beginTime = timeStamp2String(now);
                break;
            default:
                now.endTime = null;
                now.beginTime = null;
                break;
            }
            function unsetTime(thisdate) {
                thisdate.setUTCHours(0);
                thisdate.setUTCMinutes(0);
                thisdate.setUTCSeconds(0);
            }
            return now;
        }
        
        function timeStamp2String(time) {
            var datetime = new Date();
            datetime.setTime(time);
            var year = datetime.getFullYear();
            var month = datetime.getMonth() + 1 < 10 ? "0"
                    + (datetime.getMonth() + 1) : datetime.getMonth() + 1;
            var date = datetime.getDate() < 10 ? "0" + datetime.getDate()
                    : datetime.getDate();
            var hour = datetime.getHours() < 10 ? "0" + datetime.getHours()
                    : datetime.getHours();
            var minute = datetime.getMinutes() < 10 ? "0"
                    + datetime.getMinutes() : datetime.getMinutes();
            var second = datetime.getSeconds() < 10 ? "0"
                    + datetime.getSeconds() : datetime.getSeconds();
            return year + "-" + month + "-" + date;
        }
<script>