var postman = new NoJQueryPostMessageMixin('postMessage', 'receiveMessage');

var eID = "##REPLACE##EVENTID##_iframe";
var msg = {
	resize: eID,
    height: ##REPLACE##HEIGHT##,
    width: ##REPLACE##WIDTH##
};

postman.postMessage(JSON.stringify(msg), "##REPLACE##TARGETURL##", parent);