User:Frin/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; }    } } addOnloadHook(externISBN);