DateAdd : reusable Javascript function

 

While looking for a Javascript equivalent of DataAdd VB or SQL method, I came across this function which is working flawlessly. Please visit the forum post to view it directly and also as follow:

   1: function DateAdd(timeU,byMany,dateObj) {

   2:     var millisecond=1;

   3:     var second=millisecond*1000;

   4:     var minute=second*60;

   5:     var hour=minute*60;

   6:     var day=hour*24;

   7:     var year=day*365;

   8:  

   9:     var newDate;

  10:     var dVal=dateObj.valueOf();

  11:     switch(timeU) {

  12:         case "ms": newDate=new Date(dVal+millisecond*byMany); break;

  13:         case "s": newDate=new Date(dVal+second*byMany); break;

  14:         case "mi": newDate=new Date(dVal+minute*byMany); break;

  15:         case "h": newDate=new Date(dVal+hour*byMany); break;

  16:         case "d": newDate=new Date(dVal+day*byMany); break;

  17:         case "y": newDate=new Date(dVal+year*byMany); break;

  18:     }

  19:     return newDate;

  20: }