Passing key from llHTTPRequest

Hey.

i want to do the following -
in this moment a object get touch - a hash-key (md5) will be retreived from an url and stored in a variable
from this time, the object is reserved for x minutes to the avatar which touched the object.
if he pays a donation in this time to the object, a webpage should be opened which the hash-key as http-get parameter. is this possible?

I don´t know how to fetch the HTTPRequest output (the key) to a variable, which is needed to build the query-string after payment.

Any ideas?
thx.

llHTTPRequest() triggers the http_response event handler.

    key llHTTPRequest(string url, list parameters, string body)
    

You are looking for the body parameter, which returns the actual page markup. Parse it as needed and assign it to a global variable for use in other events.