page.js

// Reference
// http://benalman.com/projects/jquery-postmessage-plugin/
// http://softwareas.com/cross-domain-communication-with-iframes

// Related My post
// http://wp.me/p12fxZ-dS

// Wrapper page
var iframeSrc = "http://embedded-website.com/foobar/page.html#" + encodeURIComponent(document.location.href),
  	$iframe = $("<iframe>").attr("src", iframeSrc).appendTo("#container");
	
$.receiveMessage(
	function(e) {
		var urlParams = queryStringToJson(e.data);
		var iframeHeight = Number(urlParams.height);
		var iframeWidth = Number(urlParams.width);
		$iframe.height(iframeHeight).width(iframeWidth);
	},
	"http://embedded-website.com"
);
	
function queryStringToJson(queryString) {
    var match,
        pl     = /\+/g,  // Regex for replacing addition symbol with a space
        search = /([^&=]+)=?([^&]*)/g,
        decode = function (s) { return decodeURIComponent(s.replace(pl, " ")); },
        query  = queryString,
        urlParams = {};

    while (match = search.exec(query))
	urlParams[decode(match[1])] = decode(match[2]);
    
    return urlParams;
}

// Inner page
var parentUrl = decodeURIComponent( document.location.hash.replace( /^#/, '' ) )

function resize() {
	$.postMessage(
		{height: 1200, width:900},
		parentUrl,
		parent
	);
}