You can get a reference to an iframe using getElementById. We may get paid if you buy something or take an action after clicking one of these. Then we get a reference to the form and assign onclick handlers to its buttons. Or so I thought. The iframe element object has a property called contentDocument that contains the iframe’s document object, so you can use the parentWindow property to retrieve the window object. Note: These cross-document interactions are only possible if the documents have the same origin. Pretty disappointing. But how do you know once the iframe page has been loaded? This approach works in Internet Explorer and Firefox for same-domain pages only. The missing piece of intrigue in most discussions surrounding iframes is JavaScript object ownership. I've been a software architect at companies like Yahoo and Box, as well as an author and speaker. This article describes how to resize the height of an iframe automatically — whenever the content of the web page being published within the iframe changes. The iframe page won’t have its associated domain changed until it’s loaded and the JavaScript command to change the domain has been executed. A relative path automatically prepends the domain on which the containing page was loaded from (www.nczonline.net) versus the one assigned to document.domain. Hi, I'm Nicholas C. Zakas, an independent software developer living in Mountain View, California. The iframe page can also retrieve a reference to the iframe element in which it resides by using the window.frameElement property. books. (Health update, More about me), Copyright © 2004-2020 Human Who Codes LLC. First we show how to obtain references to the iframe and its properties and contents. This crosses the ownership boundary since the iframe is owned by the containing page but is directly accessible off the iframe’s window object. David, I have the same issue. It seemed that Internet Explorer was going to foil my day…again. For example, if I had to load an iframe page from www2.nczonline.net, that is technically considered a different domain and would not be allowed. It was clear that assigning something to the onload property didn’t produce the desired effect, but I figured there must be something else similar. Shortly after posting this blog, Christopher commented that using attachEvent() on the iframe element works in IE. At the moment, I'm recovering from Lyme disease Syntax: iframeObject.contentDocument Then, I remembered that I’m not worried about foreign content in an iframe.
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