multi-session in a page without portlets/iframe

[sanju dharma]

Hi,
I want to integrate a web application as part of other already developed web application. My application will be shown as subsection of other parent application which is completely different, has different deployment center, different session etc.

I dont want to use Iframe because it is not allowed by parent site. What is best way and cleanest way to do this ?

Main problem i see managing two separate sessions in one page and updating part of the web page (may be inside div tag?) when secondary application shows next page.

Thanks.