How to pass data to another page on another domain via POST without specifying it

I have a JSP page that has two pieces of data that I need to send to a page on another domain via post when a button is clicked.

My original iteration was just having the two pieces of data in 2 hidden fields and when the user clicked a button it posted those two data and all was good in the universe.

* I showed it to the client and they say that I can't have the data seen in View Source and I can't pass this data via get (even though anyone with a sniffer can grab the POST contents. the client wont listen).
* They also nixed my idea of using GET via sendredirect
* They are also against encrypting it and sending it via GET

Is there an “easy” way to do this with just JSP and possibly Javascript? or if necessary through a servlet?

do you have control of the ‘page on another domain’? can you POST to it using https?

I did a workaround…

essentially instead of linking to the struts action i linked to another JSP page that created a form and submitted it via post.

Everyone was happy…