[GM script]Amazon Short URL Maker

amazon_short_url_maker.user.js

// ==UserScript==
// @name           Amazon Short URL Maker
// @namespace      http://d.hatena.ne.jp/kurumigi/
// @include        http://www.amazon.tld/*
// @include        http://amazon.tld/*
// ==/UserScript==

(function() {

	if (document.getElementsByName('ASIN').length) {
		var shortURL = 'http://'+document.domain+'/dp/'+document.getElementsByName('ASIN')[0].value+'/';
		document.getElementById('btAsinTitle').innerHTML = '<a href="'+shortURL+'">'+document.getElementById('btAsinTitle').innerHTML+'</a>'
	}

})();