Access parent URL from iframe

Question

Okay, I have a page on and on this page I have an iframe. What I need to do is on the iframe page, find out what the URL of the main page is.

I have searched aroun

Answer 1

I just discovered a workaround for this problem that is so simple, and yet I haven't found any discussions anywhere that mention it. It does require control of the parent frame.

In your iFrame, say you want this iframe: src="http://www.example.com/mypage.php"

Well, instead of HTML to specify the iframe, use a javascript to build the HTML for your iframe, get the parent url through javascript "at build time", and send it as a url GET parameter in the querystring of your src target, like so:

Then, find yourself a javascript url parsing function that parses the url string to get the url variable you are after, in this case it's "url".

I found a great url string parser here: http://www.netlobo.com/url_query_string_javascript.html