User:Heavyphotons/monobook.js

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// from http://en.wikipedia.org/wiki/User:Lunchboxhero/monobook.js
function externISBN() {
  for (var i = 0; i < document.links.length; i++) 
  {
    if (document.links[i].href.match(/isbn=(.*)/))
    {
      document.links[i].href='http://www.amazon.com/exec/obidos/ASIN/'+RegExp.$1;
    }
    else if ( document.links[i].href.match(/^http:\/\/en\.wikipedia\.org\/wiki\/Special:Booksources\/(.*)/) )
    {
      document.links[i].href='http://www.amazon.com/exec/obidos/ASIN/'+RegExp.$1;
    }
  }
}
$(externISBN);