Is my page framed?
Question: Is my page framed (loaded in a frameset) or is it in the browser's top-level window?
Answer:
To test whether your page is in a frameset, you can use this conditional operator:
if (self.location!=top.location) // if yes, you're framed
if (self.location==top.location) // here you aren't framed
Example.
Let's assume that your site uses frames to provide some navigation
functionality (like this site does).
Assume that your top-level frameset is in the file
/index.htm.
What if a user arrives to some of your pages without frames?
(This might happen if the user arrived e.g. from a search engine.)
For such users, you may want to display an additional hyperlink to
your top-level frameset
- only if your page is not in the frameset yet.
if (self.location==top.location) {
// The page is not in the frameset index.htm !!!
document.write('<p><a href="/index.htm">Home page</a>')
}
A similar code is used on this page.
If you
open this page in the top-level window
of your browser, you'll see an additional hyperlink
Table of Contents (at the top of the page, right under the page title).
This hyperlink will bring you back to the framed view.
JavaScripter.net.
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© 1999-2006, Alexei Kourbatov
