Focus With Cross-domain Ajax In Opera

You'll need Opera 9.62 to see what this is all about... Because that is the only browser that behaves strange when I do cross-sub-domain JavaScript calls (with Ajax involved). Plea

Solution 1:

Some older Opera versions had a known bug that made setting document.domain affect the security context for XMLHttpRequest. Hence, after setting document.domain the script is no longer allowed to load contents from the server it actually came from.

The recommended solution is to simply upgrade to a version not affected by the bug, however if you absolutely need to support 9.6x you can easily detect the exception and fall back to using postMessage() for cross-domain communication. (In such an old version, you will need to call document.postMessage() - in newer versions it's window.postMessage() but it older versions of the HTML5 specification it was originally defined on document.)