How many days are there from today in layui js

<script>

lay('#version').html('-v'+ laydate.v);

//Execute a laydate instance

laydate.render({

  elem: '#test1' //specified element

  ,done: function(value, date){

  var s1 = value;

 

s1 = new Date(s1.replace(/-/g, "/"));

s2 = new Date();

var days =  s1.getTime() -s2.getTime();

var time = parseInt(days / (1000 * 60 * 60 * 24));

alert(time);

    alert('The date you selected is:' + value + '\nThe object obtained is' + JSON.stringify(date)+JSON.stringify(date.year)+JSON.stringify(date.month)+JSON.stringify (date.date));

   }

});

</script>