var sendToParent = function(event, data, listener) {

    var message = {

        event: event,

        data: data,

        listener: listener

    };

    window.parent.postMessage(JSON.stringify(message), "*");

};

var iframe = document.getElementById('iframe');

var sendToIframe = function(event, data, listener) {

    if (iframe && iframe.contentWindow) {

        var message = {

            event: event,

            data: data,

            listener: listener

        };

        iframe.contentWindow.postMessage(JSON.stringify(message), '*')

    }

};

var bindEvent =function (el, event, listener, useCapture) {

    'use strict';

    if (typeof useCapture === 'undefined') {

        useCapture = false;

    }

    if (el.addEventListener) {

        el.addEventListener(event, listener, useCapture);

    }

    else if (el.attachEvent) {

        el.attachEvent('on' + event, listener);

    }

};

bindEvent(window, "message", function(e){

    var data = JSON.parse(e.data)||{};

    if(data.event && (typeof events[data.event] == "function") ){

        events[data.event](data.data||{});

        if(data.listener){

            //callback

        }

    }

});