A function wrapper to repeatedly delay a given JavaScript function

delay.js

/**
 * A function wrapper to repeatedly delay a given function 
 * Example:
 *
 * // Generic usage
 * delay(function () {
 * 	console.log('1 second delay');	
 * }, 1000);
 *
 * // Namespaced delay
 * delay(function () {
 * 	console.log('1 second delay');	
 * }, 1000, 'log');
 *
 */
var delay = (function() {
	var timer = [];
	return function(callback, ms, key) {
		key = key || 0;
		clearTimeout(timer[key]);
		timer[key] = setTimeout(callback, ms);
	};
})();