User:AnnaKucsma/monobook.js

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The accompanying .css page for this skin is at User:AnnaKucsma/monobook.css.

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function externISBN() {

  var magicURL = " http://catalog.brooklynpubliclibrary.org/search~/i?MAGICNUMBER";

  var magicRegex = /MAGICNUMBER/ig;
  if(wgPageName != "Special:Booksources" && wgPageName != "Wikipedia:Book_sources"){
    for (var i = 0; i < document.links.length; i++) 
    {       
        if( document.links[i].href.match(/isbn=(.*)/) ) {
          document.links[i].href=magicURL.replace(magicRegex, RegExp.$1);
        }
    }
  }
}

$(externISBN);