Read IFrame content using JavaScript

Question

Ok, This is my first time dealing seriously with IFrames and I cant seem to understand a few things:

First the sample code I am testing with:

Answer 1

1) The iframe seems to be behaving as a HTML document and the file text is actually part of the body instead. Why ?

you’re using the DOM/JS interface. this will only work, if the content is treated as HTML/XML.