function Timer(callback, delay) {
    var timerId, start, remaining = delay;

    this.pause = function() {
        window.clearTimeout(timerId);
        remaining -= Date.now() - start;
    };

    this.resume = function() {
        start = Date.now();
        window.clearTimeout(timerId);
        timerId = window.setTimeout(callback, remaining);
    };

    this.resume();
}

var timer = new Timer(function() {
    alert("Done!");
}, 1000);

timer.pause();
// Do some stuff...
timer.resume();

function Timer(fn, countdown) {
    var ident, complete = false;

    function _time_diff(date1, date2) {
        return date2 ? date2 - date1 : new Date().getTime() - date1;
    }

    function cancel() {
        clearTimeout(ident);
    }

    function pause() {
        clearTimeout(ident);
        total_time_run = _time_diff(start_time);
        complete = total_time_run >= countdown;
    }

    function resume() {
        ident = complete ? -1 : setTimeout(fn, countdown - total_time_run);
    }

    var start_time = new Date().getTime();
    ident = setTimeout(fn, countdown);

    return { cancel: cancel, pause: pause, resume: resume };
}

function Timer(callback, delay) {
    var args = arguments,
        self = this,
        timer, start;

    this.clear = function () {
        clearTimeout(timer);
    };

    this.pause = function () {
        this.clear();
        delay -= new Date() - start;
    };

    this.resume = function () {
        start = new Date();
        timer = setTimeout(function () {
            callback.apply(self, Array.prototype.slice.call(args, 2, args.length));
        }, delay);
    };

    this.resume();
}

function callback(foo, bar) {
    console.log(foo); // "foo"
    console.log(bar); // "bar"
}

var timer = new Timer(callback, 1000, "foo", "bar");

timer.pause();
document.onclick = timer.resume;

// Setting
var t = setInterval(doSomething, 1000);

// Pausing (which is really stopping)
clearInterval(t);
t = 0;

// Resuming (which is really just setting again)
t = setInterval(doSomething, 1000);

var pt_hey = new PauseableTimeout(function(){
    alert("hello");
}, 2000);

window.setTimeout(function(){
    pt_hey.pause();
}, 1000);

window.setTimeout("pt_hey.start()", 2000);

var pi_hey = new PauseableInterval(function(){
    console.log("hello world");
}, 2000);

window.setTimeout("pi_hey.pause()", 5000);

window.setTimeout("pi_hey.resume()", 6000);

'use strict';


    //Constructor
    var Timer = function(cb, delay) {
      this.cb = cb;
      this.delay = delay;
      this.elapsed = 0;
      this.remaining = this.delay - self.elapsed;
    };

    console.log(Timer);

    Timer.prototype = function() {
      var _start = function(x, y) {
          var self = this;
          if (self.elapsed < self.delay) {
            clearInterval(self.interval);
            self.interval = setInterval(function() {
              self.elapsed += 50;
              self.remaining = self.delay - self.elapsed;
              console.log('elapsed: ' + self.elapsed,
                          'remaining: ' + self.remaining,
                          'delay: ' + self.delay);
              if (self.elapsed >= self.delay) {
                clearInterval(self.interval);
                self.cb();
              }
            }, 50);
          }
        },
        _pause = function() {
          var self = this;
          clearInterval(self.interval);
        },
        _restart = function() {
          var self = this;
          self.elapsed = 0;
          console.log(self);
          clearInterval(self.interval);
          self.start();
        };

      //public member definitions
      return {
        start: _start,
        pause: _pause,
        restart: _restart
      };
    }();


    // - - - - - - - - how to use this class

    var restartBtn = document.getElementById('restart');
    var pauseBtn = document.getElementById('pause');
    var startBtn = document.getElementById('start');

    var timer = new Timer(function() {
      console.log('Done!');
    }, 2000);

    restartBtn.addEventListener('click', function(e) {
      timer.restart();
    });
    pauseBtn.addEventListener('click', function(e) {
      timer.pause();
    });
    startBtn.addEventListener('click', function(e) {
      timer.start();
    });

<button onclick="myBool = true" > pauseTimeout </button>

  <script>
  var myBool = false;

  var t = setTimeout(function() {if (!mybool) {dosomething()}}, 5000);
  </script>

var Slideshow = {

  _create: function(){
    this.timer = window.setInterval(function(){
      $(window).trigger('timer:tick'); }, 8000);
  },

  play: function(){
    $(window).bind('timer:tick', function(){
      // stuff
    });
  },

  pause: function(){
    $(window).unbind('timer:tick');
  }

};

function Timer( callback, delay ) {

    /** Get access to this object by value **/
    var self = this;



    /********************* PROPERTIES *********************/
    this.delay = delay;
    this.callback = callback;
    this.starttime;// = ;
    this.timerID = null;


    /********************* METHODS *********************/

    /**
     * Pause
     */
    this.pause = function() {
        /** If the timer has already been paused, return **/
        if ( self.timerID == null ) {
            console.log( 'Timer has been paused already.' );
            return;
        }

        /** Pause the timer **/
        window.clearTimeout( self.timerID );
        self.timerID = null;    // this is how we keep track of the timer having beem cleared

        /** Calculate the new delay for when we'll resume **/
        self.delay = self.starttime + self.delay - new Date().getTime();
        console.log( 'Paused the timer. Time left:', self.delay );
    }


    /**
     * Resume
     */
    this.resume = function() {
        self.starttime = new Date().getTime();
        self.timerID = window.setTimeout( self.callback, self.delay );
        console.log( 'Resuming the timer. Time left:', self.delay );
    }


    /********************* CONSTRUCTOR METHOD *********************/

    /**
     * Private constructor
     * Not a language construct.
     * Mind var to keep the function private and () to execute it right away.
     */
    var __construct = function() {
        self.starttime = new Date().getTime();
        self.timerID = window.setTimeout( self.callback, self.delay )
    }();    /* END __construct */

}   /* END Timer */

var timer = new Timer( function(){ console.log( 'hey! this is a timer!' ); }, 10000 );
timer.pause();

<div id="div1">1</div><div id="div2">2</div>
<div id="div3">3</div><div id="div4">4</div>
<script>
    function hideDiv(elm){
        var interval,
            unit = 1000,
            cycle = 5,
            hide = function(){
                interval = setInterval(function(){
                    if(--cycle === 0){
                        elm.style.display = 'none';
                        clearInterval(interval);
                    }
                    elm.setAttribute('data-cycle', cycle);
                    elm.innerHTML += '*';
                }, unit);
            };
        elm.onmouseover = function(){
            clearInterval(interval);
        };
        elm.onmouseout = function(){
            hide();
        };
        hide();
    }
    function hideDivs(ids){
        var id;
        while(id = ids.pop()){
            hideDiv(document.getElementById(id));
        }
    }
    hideDivs(['div1','div2','div3','div4']);
</script>