// ==UserScript==
// @name         Check the card
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://www.amazon.co.uk/gp/buy/*
// @match        https://mbuy.ebay.co.uk/xo*
// @match        https://www.amazon.com/gp/buy/*
// @match        https://mbuy.ebay.com/xo*
// @grant        none
// @downloadURL none
// ==/UserScript==

(function(){
    var AmDiv = document.getElementById('subtotals');
    if(AmDiv){
        AmDiv.innerHTML = '<p style="color: red; font-size: 50px; line-height: 50px"><b>CHECK THE DAMN CARD FIRST</b></p>' + AmDiv.innerHTML;
        AmDiv.style.backgroundColor = 'yellow';
    }
    var EbDiv = document.getElementById('call-to-action');
    if(EbDiv){
        EbDiv.innerHTML = '<p style="color: red; font-size: 50px; line-height: 50px"><b>CHECK THE DAMN CARD FIRST</b></p>' + EbDiv.innerHTML;
        EbDiv.style.backgroundColor = 'yellow';
    }
})();