JavaScript 计时

javascript

var _JadeWebSite = {}
_JadeWebSite.setCurrentDatetime = function (data) {
  if (data.success === '1') {
    window.sessionStorage.setItem('current_timestamp', (+data.result.timestamp) * 1000)
    window.sessionStorage.setItem('current_datetime', data.result.datetime_1)
  } else {
    var currentDate = new Date()
    window.sessionStorage.setItem('current_timestamp', currentDate.getTime())
    window.sessionStorage.setItem('current_datetime', currentDate)
  }
  var nowDateTime = +(window.sessionStorage.getItem('current_timestamp'))
  _JadeWebSite.setRunTimeLong(nowDateTime)
}
_JadeWebSite.timerId = null
_JadeWebSite.nowDateTime = null
_JadeWebSite.setRunTimeLong = function (nowDateTime) {
  _JadeWebSite.updateRunTimeLong(nowDateTime)
  clearInterval(_JadeWebSite.timerId)
  _JadeWebSite.timerId = null
  _JadeWebSite.timerId = setInterval(function () {
    nowDateTime += 1000
    _JadeWebSite.updateRunTimeLong(nowDateTime)
  }, 1000)
}
_JadeWebSite.updateRunTimeLong = function (nowDateTime) {
  _JadeWebSite.nowDateTime = nowDateTime
  var startDateTime = +('1429383600000') // 2015-04-19 03:00
  var runDays = (nowDateTime - startDateTime) / 86400000
  if ($('#run_time_long').length > 0) {
    $('#run_time_long').html("本站共计运行&nbsp;<font style='color:purple'>" + runDays.toFixed(5) + "</font>&nbsp;天")
  }
}
function jsoncallbackFunc (data) {
  _JadeWebSite.setCurrentDatetime(data)
}
_JadeWebSite.getCurrentDatetime = function () {
  $.ajax({
    type: "GET",
    url: "http://api.k780.com:88/?app=life.time",
    data: "appkey=23548&sign=ed019c800dcfcdf09cdb79de51b4587d&format=json&jsoncallback=jsoncallbackFunc",
    dataType: "jsonp",
    success: function(data){
      // request callback via jsoncallbackFunc but no here @17-02-26
      _JadeWebSite.setCurrentDatetime(data)
    }
  })
}
window.onbeforeunload = function(e) {
  if (_JadeWebSite.nowDateTime) {
    window.sessionStorage.setItem('current_timestamp', _JadeWebSite.nowDateTime)
  }
}
if (!window.sessionStorage.getItem('current_timestamp')) {
  setTimeout(_JadeWebSite.getCurrentDatetime, 200)
} else {
  var nowDateTime = +(window.sessionStorage.getItem('current_timestamp'))
  _JadeWebSite.setRunTimeLong(nowDateTime)
}