// Requires timer.js
function silencer( callback, delay, timeout ) {
	var delay_until = 0,
		timer = Timer(),
		now = Date.now || function(){ return +new Date(); };

	timeout = timeout || delay;
	
	function step() {
		delay_until = now() + delay;
		callback.apply( this, arguments );
	}
	
	return function() {
		if ( now() < delay_until ) {
			timer.set( timeout, step, this, arguments );
			
		} else {
			timer.clear();
			step.apply( this, arguments );
		}
	};
}