function App(){
        function init(){
                var o1 = new Object1();
                var o2 = new Object2();
        }

        function toggleOtherObjects(){
                o2.toggle();
                // o3.toggle();
                // o4.toggle();
                // o5.toggle();

        }
}

function Object1(){
        // I can be interacted with directly
        function toggleOther(){
                App.toggleOtherObjects();
        }
}

function Object2(){
        function toggle(){
                // some toggle logic
        }
}

window.App = new App();
App.init();

function App(){
        var o1handle,o2handle
        function init(o1,o2){
                o1handle = o1.handleObject.bind.apply(o1,arguments);
                o2handle = o2.handleObject.bind.apply(o2,arguments);
        }
}

function Object1(){
    this.handleObject = function(){ // put on prototype if no closure access needed
        for(var i=0;i<arguments.length;i++){
             if(arguments[i]!== this) someActionOn(arguments[i]);
        }
    }
}

function App(){
        function init(){
                var o1 = new Object1();
                var o2 = new Object2();
        }
}

function App(){
        var objs = [];
        function init(){
                objs.push(new Object1());
                objs.push(new Object2());
                // ... push all other objects of types
        }

        function toggleOtherObjects(idx){
              objs.forEach(function(elem,i){
                 if(i!==idx) elem.toggleObject();
              });
        }
}

Dispatcher = function()
{
   var channels = {};

   this.register = function( identifier, callback )
   {
      if ( typeof channels[identifier]  === 'undefined' ){ channels[identifier] = [] }
      channels[identifier].push( callback )
   }

   this.broadcast = function( channel, payload )
   {
      if( !(typeof channels[identifier] === 'undefined' )){
        foreach (i=0, l=channels[identifier].length; i < l; i++) {
          channels[identifier][i]( payload )
        }
      }
   }

}

Object1 = function( dispatcher )
{
  var that = this

  dispatcher.register( 'objectToggled', function( payload ){
    if ( payload != that ){ that.toggle( true ) }
  }

  this.toggle = function( silently ){
    do_something()
    if (!silently){ dispatcher.broadcast( 'objectToggled', this ) }
  }
}