Add days to date using javascript

Question

I am trying to add days to a given date using javascript. I have the following code

function onChange(e) {
    var datepicker = $(\"#DatePicker\").val();
           


        

Answer 1

Date('string') will attempt to parse the string as m/d/yyyy. The string 24/06/2011 thus becomes Dec 6, 2012. Reason: 24 is treated as a month... 1 => January 2011, 13 => January 2012 hence 24 => December 2012. I hope you understand what I mean. So:

var dmy = "24/06/2011".split("/");        // "24/06/2011" should be pulled from $("#DatePicker").val() instead
var joindate = new Date(
    parseInt(dmy[2], 10),
    parseInt(dmy[1], 10) - 1,
    parseInt(dmy[0], 10)
);
alert(joindate);                          // Fri Jun 24 2011 00:00:00 GMT+0500 (West Asia Standard Time) 
joindate.setDate(joindate.getDate() + 1); // substitute 1 with actual number of days to add
alert(joindate);                          // Sat Jun 25 2011 00:00:00 GMT+0500 (West Asia Standard Time)
alert(
    ("0" + joindate.getDate()).slice(-2) + "/" +
    ("0" + (joindate.getMonth() + 1)).slice(-2) + "/" +
    joindate.getFullYear()
);

Demo here