:User:Gablejb/monobook.js

function externISBN() {

for (var i = 0; i < document.links.length; i++)

{

var ln = document.links[i].href.match(/isbn=(.*)/);

if (ln) {

document.links[i].href='http://www.amazon.com/exec/obidos/ASIN/' + RegExp.$1;

}

}

}

$(externISBN);

// User:Lupin/popups.js

mw.loader.load(

'https://en.wikipedia.org/w/index.php?title=User:Lupin/popups.js'

+ '&action=raw&ctype=text/javascript&dontcountme=s');