时间和时间戳之间的转换

<script type="text/javascript">  // 获取当前时间戳(以s为单位)  var timestamp = Date.parse(new Date());  timestamp = timestamp / 1000;  //当前时间戳为：1403149534  console.log("当前时间戳为：" + timestamp);    // 获取某个时间格式的时间戳  var stringTime = "2014-07-10 10:21:12";  var timestamp2 = Date.parse(new Date(stringTime));  timestamp2 = timestamp2 / 1000;  //2014-07-10 10:21:12的时间戳为：1404958872   console.log(stringTime + "的时间戳为：" + timestamp2);    // 将当前时间换成时间格式字符串  var timestamp3 = 1403058804;  var newDate = new Date();  newDate.setTime(timestamp3 * 1000);  // Wed Jun 18 2014   console.log(newDate.toDateString());  // Wed, 18 Jun 2014 02:33:24 GMT   console.log(newDate.toGMTString());  // 2014-06-18T02:33:24.000Z  console.log(newDate.toISOString());  // 2014-06-18T02:33:24.000Z   console.log(newDate.toJSON());  // 2014年6月18日   console.log(newDate.toLocaleDateString());  // 2014年6月18日 上午10:33:24   console.log(newDate.toLocaleString());  // 上午10:33:24   console.log(newDate.toLocaleTimeString());  // Wed Jun 18 2014 10:33:24 GMT+0800 (中国标准时间)  console.log(newDate.toString());  // 10:33:24 GMT+0800 (中国标准时间)   console.log(newDate.toTimeString());  // Wed, 18 Jun 2014 02:33:24 GMT  console.log(newDate.toUTCString());    Date.prototype.format = function(format) {         var date = {                "M+": this.getMonth() + 1,                "d+": this.getDate(),                "h+": this.getHours(),                "m+": this.getMinutes(),                "s+": this.getSeconds(),                "q+": Math.floor((this.getMonth() + 3) / 3),                "S+": this.getMilliseconds()         };         if (/(y+)/i.test(format)) {                format = format.replace(RegExp.$1, (this.getFullYear() + '').substr(4 - RegExp.$1.length));         }         for (var k in date) {                if (new RegExp("(" + k + ")").test(format)) {                       format = format.replace(RegExp.$1, RegExp.$1.length == 1                              ? date[k] : ("00" + date[k]).substr(("" + date[k]).length));                }         }         return format;  }  console.log(newDate.format('yyyy-MM-dd h:m:s'));    </script>