jQuery cross domain iframe scripting

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There is no way to make this work. Unless, the foreign domain you try to access supports a procedure like C.O.R.S, JSONP or postMessage.

There are a few exceptions (like always):

If you’re dealing with a WebApp for instance, you can tell your users that they have to grant access to cross-domain-calls.

In Gecko/Firefox for instance, you can call

netscape.security.PrivilegeManager.enablePrivilege('UniversalBrowserRead')

which enables the browser to access foreign domains via ajax/iframes. In this scenario, an user has to set 

signed.applets.codebase_principal_support

to true under about:config to make this work.

In the Internet Explorers of this world, there is a setting called something like allow cross-domain access deeply hidden in the security tab, which must be set to enable.

Chrome allows cross-domain calls with a commandline argument:

chrome.exe --disable-web-security

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