aichholzer

Here’s a simple one I came up with. It does a countdown until a certain date. Quite simple.

Hope you can find use for it:

var CDOWN = {
 init : function()
  {
   this.dformat = "[D]:[H]:[M]:[S]"; // Day:Hour:Minute:Second - Any can be removed
   this.tdate = "11/19/2008 6:00 PM"; // Until when to countdown (MM/DD/YYYY)
   this.count = true; // Update the counter each second or minute or whatever is defined above
   this.endstr = "Live now!"; // To display once the countdown is complete
   this.lzero = true; // Display leading zeros on numbers lower than 10
   this.counts = -1;

   this.counts = Math.ceil(this.counts);
   if(this.counts == 0)
     this.count = false;

   this.timeoutp = (Math.abs(this.counts)-1)*1000 + 990;

   dthen = new Date(this.tdate);
   dnow = new Date();

   ddiff = (this.counts > 0) ? new Date(dnow-dthen) : new Date(dthen-dnow);

   gsecs = Math.floor(ddiff.valueOf()/1000);
   CDOWN.startCounter(gsecs);
 },

calculate : function(secs, num1, num2)
 {
   s = ((Math.floor(secs/num1))%num2).toString();
   if(this.lzero && s.length < 2)
     s = "0" + s;
   return s;
 },

startCounter : function(secs)
 {
   if(secs < 0)
    {
     document.getElementById("timer").innerHTML = this.endstr;
     return;
    }

    this.dsp = this.dformat.replace(/\[D\]/g, CDOWN.calculate(secs,86400,100000));
    this.dsp = this.dsp.replace(/\[H\]/g, CDOWN.calculate(secs,3600,24));
    this.dsp = this.dsp.replace(/\[M\]/g, CDOWN.calculate(secs,60,60));
    this.dsp = this.dsp.replace(/\[S\]/g, CDOWN.calculate(secs,1,60));

    document.getElementById('timer').innerHTML = this.dsp;
    if(this.count)
      setTimeout("CDOWN.startCounter(" + (secs+this.counts) + ")", this.timeoutp);
 }
}

/* LOAD */
function addLoadEvent(fn)
 {
   var old = window.onload;
   if(typeof window.onload != 'function')
     window.onload = fn;
   else
     window.onload = function()
      {
        old();
        fn();
      }
 }

addLoadEvent(function() { CDOWN.init(); });

In order to display this inside some container, you will need to define one and set it’s ID to be the same as in the script. For example:

document.getElementById('timer').innerHTML = this.dsp;

In this case my container’s id is “timer” and the actual countdown will be displayed there.