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Posted By

crevier on 12/14/09


Tagged

date days add


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bullzito


date math

 / Published in: JavaScript
 

This function accepts a date string (yyyymmdd), along with a number of days (integer) and adds the days to the date. It then returns the new date string (yyyymmdd).

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  1. function addToDate(date,days) {
  2.         var yyyy,mm,dd,idate,newdate;
  3.  
  4.         date    = String(date);
  5.         yyyy    = date.substr(0,4);
  6.         mm      = date.substr(4,2) - 1;
  7.         dd      = date.substr(6,2) - 0;
  8.         idate   = new Date(yyyy,mm,dd,0,0,0,0);
  9.  
  10.         idate.setTime(idate.getTime()+60000*60*24*days);
  11.  
  12.         yyyy    = idate.getYear();              if (yyyy < 1000) yyyy += 1900;
  13.         mm      = idate.getMonth() + 1;         if (mm < 10) mm = '0' + mm;
  14.         dd      = idate.getDate();              if (dd < 10) dd = '0' + dd;
  15.  
  16.         newdate =  parseInt(String(yyyy) + String(mm) + String(dd));
  17.  
  18.         return newdate;
  19. }

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