The X-Lab - Experimental Development Repository

Countdown
Category: time/date
Language: Javascript
Description:
Source Code:
<!--### Written by Micah Atwell - www.micahatwell.com/xlab ###-->
<!--
   /* PRIMARY FUNCTION; Place this script block in the Head of your HTML file
      Argument is the future date to which to count down; Accepts date string as argument. some examples are:
         "Fri, 21 Dec 2012 23:59:59 GMT+0430"
         "Dec 22 2012"
         "12/21/2012 23:59:59"
      Returns a string containing the time remaining between the above 2 dates (format: "1 day, 07:19:59")
   */
   function getTimeLeft(futureDate){
      var now=new Date(); // today's date
      var then=new Date(futureDate); // user-submitted time in the future
      var span=then-now; // number of milliseconds between "now" and "then"
      if(span<=0)return 'Countdown Over';
      var f=new Array(); // array of "f"riendly span values, see below...
      with(Math){
         f[0]=floor(span/1000/60/60/24/30/12); // years
         f[1]=floor((span-=(f[0]*31104000000))/1000/60/60/24/30); // months
         f[2]=floor((span-=(f[1]*2592000000))/1000/60/60/24); // days
         f[3]=floor((span-=(f[2]*86400000))/1000/60/60); // hours
         f[4]=floor((span-=(f[3]*3600000))/1000/60); // minutes
         f[5]=floor((span-=(f[4]*60000))/1000); // seconds
      }
      return f[2]+" day"+pluralize(f[2])+", "+pad(f[3])+":"+pad(f[4])+":"+pad(f[5]);
   }
   // Internal function; determines if/when to pluralize a word,
   // based on the received number (argument "n")
   function pluralize(n){
      if(n==1)return "";
      return "s";
   }
   // Internal function; determines if/when to pad a number (argument "n")
   // to standard 2-digit time format ("HH:MM:SS")
   function pad(n){
      n=n.toString();
      if(n.length!=2)return n="0"+n;
      return n;
   }
//-->