:User:Heavyphotons/monobook.js

// 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);