MediaWiki:Timer.js

// ***************************************************** // * Experimental javascript countdown timer (Splarka) * // * Version 0.0.3                                    * // ***************************************************** // // Usage example: // //  Only January 01 2007 00:00:00 PST until New years. // //  Javascript disabled.

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 = ''; } 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; 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);

// ************************************************** // - end -  Experimental javascript countdown timer // **************************************************