// dynamically resize height of iframe with id of CI_IFRAME_ID
CI = {
	onMessage: function(e) {
		var iframe = document.getElementById(CI_IFRAME_ID);
		iframe.style.height = e.data;
	}
};

// install resize function as an event listener
// IE
if (window.attachEvent) {
	window.attachEvent("onmessage", CI.onMessage);
// sane browsers
} else if (window.addEventListener) {
	window.addEventListener("message", CI.onMessage);
}