Getting Contents of Iframe with Pure JavaScript

I already can get the content of an Iframe with jQuery, though I would like to learn how to get it with pure JavaScript.

This is what I have so far.

 var frame = document.getElementById('awc_frame');
 var easyBB = frame.contentWindow.document.body.innerHTML;
 easyBB.getElementById('chatbox-title').innerText="Chatbox";

What am I doing wrong, please help. Also originally the frame does not have an ID, and I already tried this

var frame = document.frames['awc_frame'];

Is that cross browser efficient? And then how do I get the contentWindow? Just some explanation so I can do this with JavaScript and not jQuery. jQuery version is this

var frame = $('#avacweb_chat iframe');
var easyBB = $('#chatbox-title',frame.contents()).text('Chatbox');

Answers:

Answer

If it is on the same domain, try this. It won't let you access iframe contents if the iframe is of a different origin than the window that you are viewing.

var iframe = document.getElementById("awc_frame");
var iframe_contents = iframe.contentDocument.body.innerHTML;

Working example with jsfiddle iframe viewing a page on the same domain:

http://jsfiddle.net/tqAL3/1/

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