Javascript screensaver

js-screensaver.js

(function(poll, timeout){

	var _idle = false,
		_lastActive = 0,
		_activeNow = function() {
			_lastActive = new Date();

			if (_idle) {
				$('#screensaver').hide();
				_idle = false;
			}
		},
		_poll = function() {

			var elapsed = (new Date()) - _lastActive;

			if ((elapsed > timeout) && !_idle) {
				$('#screensaver').fadeIn('slow');
				_idle = true;
			}
		}

	$(window).bind('mousemove click keypress resize focus', _activeNow);
	
	window.setInterval(_poll, poll);

	_activeNow();
})(2000, 5000);