I have two servers server1.contoso.com
and server2.contoso.com
and have to display content of both servers in two frames of the same frameset:
<frameset cols="50%,50%">
<frame src="http://server1.contoso.com/invoices/index.html?open">
<frame src="http://server2.contoso.com/invoices_new/index.html">
</frameset>
Both servers host an invoice system each. These systems cannot be put on a single server, and neither server may reverse-proxy the other.
Now I want the ExtJS grid in both frames to scroll synchronously. But I can't access the frames' content and hook into their scroll
events due to cross-site scripting restrictions.
How can I circumvent this problem?