How to submit a form from different domain

Hi,

There's an existing application I need to incorporate.

First thing is I need to create a login page to login the system.  

I was thinking about having an iframe on my login page.  The iframe's src would be the system's login page.  When I click submit on my login page, it would submit the iframe.

I got an error incorporating the iframe:
Refused to display 'http://www.mysite.com/jbosslegore/APlegore/faces/login.xhtml' in a frame because it set 'X-Frame-Options' to 'SAMEORIGIN'.

Thank you.
levbaoAsked:
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GaryCommented:
The ACTION attribute of a form can be an external website, you just need to set the username and password inputs name to the same as the external website uses.

Whether that website allows it is another thing.
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levbaoAuthor Commented:
Hi Gary,

I did try to copy the form inputs on the system's login page to my login page but it didn't do anything only redirects to the system's login page.

I was told that submiting directly to the system's login page wouldn't work and I have to submit it through an iframe.

Thanks Gary.
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GaryCommented:
Then they probably don't allow it - there is a security aspect here - if they are entering their login information on your site then you have full access to it, not very secure.
Submitting it through an iframe means loading that sites login page in the iframe - where you have no access to the login information
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