in reply to Sending information via HTTP "POST" without submitting a form
The Javascript XMLHTTPRequest object may be used for this purpose - There is an article on xml.com (http://www.xml.com/pub/a/2005/02/09/xml-http-request.html) which describes a solution for a situation similar to what you outline.
perl -le "print unpack'N', pack'B32', '00000000000000000000001000000000'"
In Section
Seekers of Perl Wisdom