I'm not sure I understand your question. Are you asking how to work around the 4096 character limit for the vArguments parameter of showModalDialog? If so, the answer is that you can't. As documented on the reference page, vArguments only supports 4096 characters.
If you need to send more characters, then you'll need to use something other than showModalDialog, such as a separate data collection page or similar technique.
If that's not the question you're asking, would you mind clarifying?
There is no sorry with your answer. :-)
I got confirmed otherwise I keep doubt there might be a way for showModalDialog to take some args to tell the IE this call is a POST method call.
I know that there is other way out there to sove my problem. It just take a little longer than expected if have to choose other way to open the pop up Cuz I am fixing bug not new implementation..
I do appreciate your answer. :-)
page (a) is your main page
page (b) is your modal popup (note, using the modal popup means that it will only work in IE, not in any other browser)
- - - - - -
on page (a), create a form with all your data.
open your popup (b) (modal or non-modal, it doesn't matter)... BLANK.
as soon as it is open, set the target of the page (a) form to the popup window, and submit your form via method = POST.