how to add days in javascript specific date format

Question

Hello I have date in this format 03/08/12 where 03 is month, 08 is day and 12 is year. Now I want to add days in it. I have tried following but not getting the exact result

  checkindate = new Date($("#checkindate").val());
  checkindate.setDate(checkindate.getDate()+no_of_nights);
  $("#checkoutdate").val((checkindate.getMonth()+1)+"/"+checkindate.getDate()+"/"+checkindate.getYear());

But is is giving unexpected result and I am unable to understand in which part of date it is adding. Can Any body tell me how can I do this?

Regards

Answer 1

What you have now will not work in all situations because you are adding the no_of_nights to the Day value which means you could have 31 + 5, setDate() will not give you the expected outcome with a value of 36.

You must figure out how many months, days, years, etc. you want to add.

Javascript works off of miliseconds from 1/1/1970 and not normal time.

Answer 2

Your code works perfectly, but make sure no_of_nights is not a string . That's probably your issue: the addition operation checkindate.getDate()+no_of_nights becomes a concatenation operation if no_of_nights is a string.

8 + 5 = 13
8 + "5" = "85"

Very different!

Solution: use parseInt(no_of_nights) .