Tasking jobs, will catch-up, get back on track

Tasker.js

function Tasker () {
	this.tasks = [];
	this.wait();
}
Tasker.prototype = {
	resolution: 1000,
	timeoutID: 0,
	isWaiting: false,
	tasks: [],
	add: function (name, perform, interval) {
		this.tasks.push({
			name: name,
			perform: perform,
			interval: interval,
			last: 0
		});
	},
	remove: function (name) {
		for (var i = 0; i < this.tasks.length; i++) {
			if (this.tasks[i].name === name) {
				this.tasks.splice(i, 1);
			}
		}
	},
	destroy: function () {
		if (this.isWaiting) {
			window.clearTimeout(this.timeoutID);
		}
		this.isWaiting = false;
		this.timeoutID = 0;
		this.tasks.length = 0;
	},
	run: function () {
		var now = (new Date()).getTime();
		var diff = 0;
		var i = 0;
		var task;
		for (i = 0; i < this.tasks.length; i++) {
			task = this.tasks[i];
			diff = now - task.last;
			if (diff >= task.interval) {
				task.perform(diff);
				task.last = now;
			}
		}
	},
	wait: function () {
		var THIS = this;
		if (!this.isWaiting) {
			this.timeoutID = window.setTimeout(function () {
				THIS.isWaiting = false;
				THIS.play();
			}, this.resolution);
			this.isWaiting = true;
		}
	}
};

var tasks = new Tasker();
tasks.add('poll database service', function () {
	// do that…
}, 1000);