How do i add the year

JavaScript
1

Hi, I need some help please i am trying to add the year in my datepicker during the change event,but i have no idea how can i add the year,
so if this is the format of my date . Sep/03/2013
how to add it to make it one year. Sept/03/2014

here is my code.


$(function(){
   $('#mydate').change(function(e){
       e.preventDefault();
       var newdate = $(this).val();

       $('#otherdate').val(newdate);
   }) ;

});

Thank you in advance.