document.addEventListener("DOMContentLoaded", function() {

        const augmentedPaymentLinks = ["buygoods.com/secure/"]
          .sort(function(a,b) { return b.length - a.length })
          .map(function(url) {
            return new RegExp("^https?://(.+\\.)?" + url, "i")
          })

        for (let el of document.getElementsByTagName("A")) {
          const href = el.getAttribute("href")
          if (!href || href === "#") {
            continue
          }
          for (let url of augmentedPaymentLinks) {
            if (!url.test(href)) {
              continue
            }
            const params = []
            for (const entry of [
              [ "external_order_id",  "e59515dd83eab25769fa13504eadb3dc" ],
              [ "external_order_id2", "24" ],
              [ "external_order_id3", "i" ],
              [ "external_order_id4", "gluco6.com" ],
            ]) {
              if (new RegExp("[?|&]" + entry[0] + "=", "i").test(href)) {
                continue
              }
              params.push(entry.join("="))
            }
            if (!params.length) {
              continue
            }
            const glue = href.includes("?")
              ? "&"
              : "?"
            el.setAttribute("href", href + glue + params.join("&"))
          }
        }
      })