[SOLVED] ADD just six months to a given date?

[sayedsohail]

Hi everyone,

 

I got a form with to fields, 

 

Signdate=today which is fine

expire date = signdate+6months

 

How do i achieve add six months to signdate.  Please help.

[sayedsohail]

This is so far i tried, but no success.

 

Date.prototype.addMonths = function(m) {

        // Adds the number of months to date.

 

        this.setMonth(this.getMonth() + m);

    };

           

 

// number of months:

        var n = getElementById('howmanymonths').value;

        var selectdate = document.getElementById('signdate');

        expiredate.addMonths(n);

// set expire date :

document.getElementById('expiredate').value= expiredate;

 

[sayedsohail]

???

 

Date.prototype.addMonths = function(m) {

// Adds the number of months to date.

 

// date is typed in <input type='text' id='signdate'>MM/DD/YYYY format

var selectdate = document.getElementById('signdate');

 

selectdate.setMonth(selectdate.getMonth() + m);

};

 

 

// number of months: is selected in a drop down from 1 to 24

 

var n = getElementById('howmanymonths').value;

 

expiredate.addMonths(n);

// set expire date in mm/dd/yy format.

document.getElementById('expiredate').value= expiredate;