I've already got the @include and @exclude statements down.
I need:

For a page of form:
https://www.YYY.com/public/lend/listing.aspx?listingID=15344
(where YYY is some static domain name that I will decide on later)
I want to display the 
http://ZZZ.wikispaces.com/15344
underneath the contents of the first page.
(where ZZZ is some static domain name that I will decide on later,
testbed.wikispaces.com is the standin for now.)

or more generally this script should for every page of the form,
https://www.YYY.com/public/lend/listing.aspx?listingID=XYZ
add the contents of 
http://ZZZ.wikispaces.com/XYZ

underneath the contents of the first page (in a frame if possible).

and XYZ is some number (not necessarily 3 digit)

One way to implement this would be to add the text contents (or the
page itself, whichever is easier) of the 2nd page in a frame at the
bottom of the first.

Again, I will fill in the ZZZ and YYY domains on my own later, and
those will stay fixed.  The only dynamic element is the # at the end
of the url.

As simple as this is, I'd also want you to relinquish claims to
copyright on this scriptlet.

---

Clarification of Question by grrarrgh-ga on 08 May 2006 11:38 PDT

you may find this chunk of code useful:

var href = window.location.href;
var loanarr= href.split("=");
var loan = loanarr[1];

this should do the trick; it doesn't add a frame, but an iframe below
whatever element you want

// ==UserScript==
// @name            Frame Adder
// @namespace       
// @description     
// @include         YOUR SITE GOES HERE
// ==/UserScript==


(function() {

    var addFrame =
    {
        go: function()
        {

	    var listingID =  window.location.href.split("=")[1];

	    //change this to whatever element you want the frame to be added
to (usually a DIV or SPAN)
            var thisNode = document.getElementById("ELEMENTS_ID");

	    var ifrID = "wiki";
	    var targetNode = thisNode;
	    var br = document.createElement("br");
	    var ifr = document.createElement("iframe");
	    ifr.id = ifrID;
	    ifr.src = "http://ZZZ.wikispaces.com/" + listingID;
	    ifr.style.marginTop = "5px";
	    ifr.style.width = "100%";
	    ifr.style.height = "500px";
	    ifr.style.display = "block";
	    ifr.style.visibility="visible"

	    targetNode.appendChild(br);
	    targetNode.appendChild(ifr);

        }
    }

    addFrame.go();

})();