Amazon Bitcoins

amazonbitcoins.user.js

// ==UserScript==
// @name           Amazon Bitcoins
// @namespace      joeyhewitt
// @description    Show prices on Amazon in Bitcoin
// @match          http://www.amazon.com/*
// @match          https://www.amazon.com/*
// ==/UserScript==

// https://gist.github.com/437513

(function(callback) {
    var script = document.createElement("script");
    script.textContent = "(" + callback.toString() + ")(jQuery);";
    document.body.appendChild(script);
})(function($) {

    var BTCPerUSD = 6.59;
    var convertUSD = function(text) {
        return text.replace(/\$\d+(\.\d\d)?/g, function(USD) {
            return (parseFloat(USD.substring(1)) / BTCPerUSD).toFixed(2)+ ' BTC';
        });
    };

    $('.t14, .price, .priceLarge, .listprice, .tmm_olpLinks>a, #actualPriceExtraMessaging, .fionaBuyBox font, .t11, .mbcPriceCell, .plusShippingText').each(function() {
        var $priceEl = $(this);
        var originalPriceText = $priceEl.text();
        var btcPriceText = convertUSD(originalPriceText);
        $priceEl.hover( function() { $(this).text(originalPriceText); },
                        function() { $(this).text(btcPriceText) } );
        $priceEl.text(btcPriceText);
    });

});