changeDate: function (starttime,stoptime) {      //判断时间的大小弹窗提示用户
 var _t = this;
  if(stoptime != '' && starttime != ''){
   if(stoptime < starttime){
    $('#stop-date').val('');
    $('#time').modal('show');
    setTimeout(function(){($('#time').modal('hide'))},3000);
    return;
   }
  }
 },

 timeDatapicker:function () {
  var _t = this;           //this
  var startDate = $('#start-date'),      //开始时间
   stopDate = $('#stop-date');       //结束时间

  startDate.datetimepicker({
   format: 'yyyy-mm-dd',
   autoclose: true,
   minView: 2,
   language:'zh-CN'
  }).on('change',function () {       //changeData方法写在change之后,是为了防止changeData有changge方法(避免冲突)
   var starttime = startDate.val();
   var stoptime = stopDate.val();
   _t.changeDate(starttime,stoptime);
   stopDate.datetimepicker('setStartDate',starttime); //结束时间的选择将以选择的开始时间为依据从新设置(等于开始 时间)

  }).on('changeDate',function () {
   var starttime = startDate.val();
   stopDate.datetimepicker('setStartDate',starttime); //结束时间的选择将以选择的开始时间为依据从新设置(等于开始 时间)
   var stoptime = stopDate.val();
  });

  stopDate.datetimepicker({
   format: 'yyyy-mm-dd',
   autoclose: true,
   minView: 2,
   language:'zh-CN'
  }).on('change',function () {
   var starttime = startDate.val();
   var stoptime = stopDate.val();
   _t.changeDate(starttime,stoptime,$(this));

  }).on('changeDate',function () {

   var starttime = startDate.val();
   var stoptime = stopDate.val();
   startDate.datetimepicker('setEndDate',stoptime);
   stopDate.datetimepicker('setStartDate',starttime);
  });

 },