var Timer=function(millis,callback){return this._init(millis,callback)};Timer.prototype={VERSION:1.0,_init:function(millis,callback){this._interval=1000;this._timer=null;this._cbs=[];this._multipliers=[];this._tickCounts=[];this._canRun=[];this._stoppedThreads=0;this._runOnce=false;this._startedAt=-1;this._pausedAt=-1;if(typeof(millis)=='number')this._interval=millis;this.addCallback(callback);return this},_preset:function(){this._stoppedThreads=0;this._startedAt=-1;this._pausedAt=-1;for(var i=0;i<this._cbs.length;i++){this._canRun[i]=true;this._tickCounts[i]=0}},_ticks:function(initInterval){var me=this;for(var i=0;i<this._cbs.length;i++){if(typeof(this._cbs[i])=='function'&&this._canRun[i]){this._tickCounts[i]++;if(this._tickCounts[i]==this._multipliers[i]){this._tickCounts[i]=0;if(this.runOnce()){this._canRun[i]=false;this._stoppedThreads++}window.setTimeout(me._cbs[i],0)}}}if(this.runOnce()&&this._stoppedThreads==this._cbs.length)this.stop();if(typeof(initInterval)=='number'){this.stop().start(null,true)}},runOnce:function(isRunOnce){if(typeof(isRunOnce)=='undefined')return this._runOnce;else if(typeof(isRunOnce)=='boolean')this._runOnce=isRunOnce;else alert("Invalid argument for runOnce(...).\n\nUsage: runOnce(true | false) /*Default value: false*/\nor, runOnce() to get status");return this},interval:function(millis){if(typeof(millis)=='undefined')return this._interval;else if(typeof(millis)=='number')this._interval=Math.floor(millis);return this},stop:function(isPausing){if(this._timer){if(!isPausing)this._pausedAt=-1;try{window.clearInterval(this._timer)}catch(ex){}this._timer=null}return this},isStopped:function(){return((this._timer==null)&&!this.isPaused())},start:function(_initialInterval,_withoutPreset){if(this.isPaused())return this.resume();if(!this.isStopped())return this;if(!_withoutPreset)this._preset();var tmpInterval=this._interval;if(typeof(_initialInterval)=='number')tmpInterval=_initialInterval;var me=this;this._timer=window.setInterval(function(){me._ticks(_initialInterval)},tmpInterval);this._startedAt=(new Date()).getTime();this._startedAt-=(this._interval-tmpInterval);return this},pause:function(){if(this._timer){this._pausedAt=(new Date()).getTime();this.stop(true)}return this},isPaused:function(){return(this._pausedAt>=0)},resume:function(){if(this.isPaused()){var tempInterval=this._interval-((this._pausedAt-this._startedAt)%this._interval);this._pausedAt=-1;this.start(tempInterval,true)}return this},restart:function(){return this.stop().start()},addCallback:function(callback,N){if(typeof(callback)=='function'){this._cbs.push(callback);if(typeof(N)=='number'){N=Math.floor(N);this._multipliers.push((N<1?1:N))}else this._multipliers.push(1);this._tickCounts.push(0);this._canRun.push(true)}return this},clearCallbacks:function(){this._cbs.length=0;this._multipliers.length=0;this._canRun.length=0;this._tickCounts.length=0;this._stoppedThreads=0;return this}};