Board Thread:Support Requests - Getting Technical/@comment-22479560-20131105015833/@comment-1158325-20131105041055

The second question mark (any question mark after the first, in general) needs to be an ampersand (&). You'd have to be careful about using this in combination with links that may add other query strings. To answer your question, you could use JavaScript - there's a handy function mw.util.getParamValue(str) that can get the values for you. However, it seems like there would probably be a better way to do this using a template depending on what you need it to do.