Template:Timer

function updatetimer(i) { var now = new Date; var then = timers[i].eventdate; var diff = count=Math.floor((then.getTime-now.getTime)/1000); // catch bad date strings if(isNaN(diff)) {  timers[i].firstChild.nodeValue = '** ' + timers[i].eventdate + ' **' ; return; }  // determine plus/minus if(diff<0) { diff = -diff; var tpm = 'T plus '; } else { var tpm = ''; }  // calcuate the diff var left = (diff%60) + ' seconds'; diff=Math.floor(diff/60); if(diff > 0) left = (diff%60) + ' minutes ' + left; diff=Math.floor(diff/60); if(diff > 0) left = (diff%24) + ' hours ' + left; diff=Math.floor(diff/24); if(diff > 0) left = diff + ' days ' + left var diffing = count=Math.floor((then.getTime-now.getTime)/1000); if(diffing<0) { timers[i].firstChild.nodeValue = 'Timer has expired'; } else { timers[i].firstChild.nodeValue = tpm + left; }   // a setInterval is more efficient, but calling setTimeout // makes errors break the script rather than infinitely recurse timeouts[i] = setTimeout('updatetimer(' + i + ')',1000); }  function checktimers { //hide 'nocountdown' and show 'countdown' var nocountdowns = getElementsByClassName(document, 'span', 'nocountdown'); for(var i in nocountdowns) nocountdowns[i].style.display = 'none' var countdowns = getElementsByClassName(document, 'span', 'countdown'); for(var i in countdowns) countdowns[i].style.display = 'inline'  //set up global objects timers and timeouts. timers = getElementsByClassName(document, 'span', 'countdowndate'); //global timeouts = new Array; // generic holder for the timeouts, global if(timers.length == 0) return; for(var i in timers) { timers[i].eventdate = new Date(timers[i].firstChild.nodeValue); updatetimer(i); //start it up } } addOnloadHook(checktimers);