Simple class for managing timeouts in JavaScript

timeout.js

/**
 * Simplify the process of setting and resetting timeouts.
 * @param fn callback to invoke
 * @param delay time in MS
 *
 * Any additional parameters are passed to the callback when invoked.
 */
function Timeout(fn, delay) {
    var timeout = null,
        args = $.map(arguments, function(v, i) {
            if(i > 1) {
                return v;
            }
        });

    /**
     * Determine if the timeout is active.
     */
    var isActive = this.isActive = function() {
        return timeout !== null;
    };

    /**
     * Cancel the timeout.
     */
    var stop = this.stop = function() {
        if(isActive()) {
            window.clearTimeout(timeout);
            timeout = null;
        }
    };

    /**
     * Immediately run the callback and cancel the timeout.
     */
    var run = this.run = function() {
        stop();
        fn.apply(null, args);
    };

    /**
     * Start the timer or restart it if it is already running.
     */
    this.start = function() {
        stop();
        timeout = window.setTimeout(function() {
            timeout = null;
            run();
        }, delay);
    };
}