I have an application which generates an http request from the following -

gkRequestID = llHTTPRequest(gsUpdateURL,[HTTP_METHOD,"POST",HTTP_MIMETYPE,"application/x-www-form-urlencoded"],lsOptions+"&au="+llMD5String(lsOptions+"#"+gsGame Key,giGameNonce));

if the website is a.b.c what will the generated string created be?

http://a.b.c/d.php ? followed by lsOptions and the other parts.
It is this [HTTP_METHOD,"POST",HTTP_MIMETYPE,"application/x-www-form-urlencoded"] that I don't understand.

if I want to send an http://a.b.c/d.php followed by parameters what do they have to be?