MediaWiki:Common.js/countdowntimer.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. // // If the date is in the format "x|January 01 2007 00:00:00 PST", then the timer is periodic with period x seconds using the given date as the starting time. function updatetimer(i) { var now = new Date; var then = timers[i].eventdate; var diff = Math.floor((then.getTime-now.getTime)/1000); // catch bad date strings if(isNaN(diff)) { timers[i].firstChild.nodeValue = '** ' + timers[i].eventdate + ' **' ; return; } // reduce modulo period if necessary if(timers[i].period > 0){ if(diff<0) diff = timers[i].period - ((-diff)%timers[i].period); else diff = diff%timers[i].period; } // determine plus/minus if(diff<0) { diff = -diff; var tpm = 'T plus '; } else { var tpm = 'T minus '; } // 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'); timeouts = new Array; // generic holder for the timeouts, global if(timers.length == 0) return; for(var i in timers) { var str = timers[i].firstChild.nodeValue; var j = str.indexOf('|'); if(j == -1) timers[i].period = 0; else { timers[i].period = parseInt(str.substr(0, j)); if(isNaN(timers[i].period) || timers[i].period < 0) timers[i].period = 0; str = str.substr(j + 1); }   timers[i].eventdate = new Date(str); updatetimer(i); //start it up  } } addOnloadHook(checktimers); // ************************************************** // - end -  Experimental javascript countdown timer // **************************************************