Cross domain iframe content load detection

It's possible to do this with an onload handler on the iframe itself. Unfortunately (surprise!) IE makes it difficult. The only way I could get this to work was to compose HTML for the iframe, then append it to the document with innerHTML. Then I have to poll to see when the iframe appears in the DOM, which varies depending on if the page is loading. Here's a link to the source: http://svn.openlaszlo.org/openlaszlo/trunk/lps/includes/source/iframemanager.js

See create(), __finishCreate() and gotload(). Feel free to take a copy of this and use it yourself!

Regards, Max Carlson OpenLaszlo.org

You could try using postMessage for communication between frames.
This will require the remote site to include some specific JavaScript to post a message to the parent document when it has finished loading.

The easiest way (if you can get code added to the external sites) is to have them add an invisible iframe pointing to a special html file on your domain. This could then use parent.parent.foo() to notify the original window about the load event.

Listening for the "load" event will only tell you if the window loaded, not what was loaded or if the document is ready for interaction.

Nicholas Zakas has an article about detecting if an iframe loaded: http://www.nczonline.net/blog/2009/09/15/iframes-onload-and-documentdomain/. Basically you have this code snippet:

var iframe = document.createElement("iframe");
iframe.src = "simpleinner.htm";

if (iframe.attachEvent){
    iframe.attachEvent("onload", function(){
        alert("Local iframe is now loaded.");
    });
} else {
    iframe.onload = function(){
        alert("Local iframe is now loaded.");
    };
}

document.body.appendChild(iframe);

I haven't tested it, but I'm pretty sure jQuery should be able to handle it by doing something like $("#iframe").load(function () { alert("Local iframe is now loaded."); });