Cannot get the korean value that was posted to CGI.

CASE-1: From a CGI window, when I open another CGI window using window.open() and post a korean value [ encoded using Javascript encodeURI() ] through the URL, and then if I read the input using PERL from
STDIN, I dont receive the original Korean string. I see some junk content.

CASE-2: On the other side, if I post the Korean value [ encoded with EUC_KR ] using Java to the same CGI window, I could get my original Korean string from the PERL STDIN. In this case, I am before posting
it to the CGI.

For the both the above cases the web server used is Apache (2.0.54)
Is there any way to resolve CASE-1?