How to get the height of an iframe with javascript from inside the iframe? What about pages with multiple iframes?

Question

Is there a way to detect the height and width of an iframe, by executing a script from inside the iframe? I need to dynamically position some elements in the iframe according to the different height/width of the iframe.

Would there be any difference if there are multiple iframes in the same page? i.e. each iframe wants to find its own dimensions.

Javascript or jquery solutions welcomed.

Thanks!

<iframe src='http://example.com' width='640' height='480' scrolling='no' frameborder='0' longdesc='http://example.com'></iframe> 

The iframes have to be embeded on other sites, and as mentioned by one of the answers below, I've hit permission problems.

Answer 1

If your iframe’s page and its parent page are served from different domains (meaning you can’t access the parent page’s DOM properties from the iframe page), then I think it’s the same as when you’re trying to work out the viewport height.

For that, see:

• Get the browser viewport dimensions with JavaScript

Or possibly this:

• http://andylangton.co.uk/articles/javascript/get-viewport-size-javascript/

Answer 2

Be aware that code like this:

var thisIframesHeight = window.parent.$("iframe.itsID").height(); 

will only be safe if the source of the iframe and parent window are from the same domain. If not you will get permission denied problems and you will have to take another approach.