How to access inside frame

Question

How to access into iframe:

var iframe = document.getElementById(\'sitefield1\');
var innerDoc = iframe.contentDocument || iframe.contentWindow.document;
var          


        

Answer 1

You can't directly access frames across origins. In modern browsers you can use postMessage.

The frame sending the data needs to call postMessage

top.postMessage({ foo: "bar" }, "*");

and the frame receiving the data needs to register an event listener to look for messages and react to them.

window.addEventListener("message", receiveMessage, false);
function receiveMessage(evt) {
    alert(event.data.foo);
}