Java – Can a signed Java Applet/Web Start manipulate content in a cross-site IFRAME

appletcross-domaindomjava

Is it possible for a signed Java Applet or Web Start app to write to the DOM of an IFRAME under a different domain?

Does the fact that they're a signed applet/javaws allow them to ignore browsers' standard cross-browser security?

If this does work, how well is it supported across the major browsers?

Thanks!

EDIT:

My motivation is to add a browser plugin-like tool to third-party websites I don't control. It's not required that I use Java at all—any ideas or suggestions are encouraged.

Best Solution

No, Java, even signed Java applets, do not give JavaScript powers.

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