diff --git a/scripts/invoice.js b/scripts/invoice.js
new file mode 100644
index 0000000..f93500a
--- /dev/null
+++ b/scripts/invoice.js
@@ -0,0 +1,47 @@
+(function() {
+    document.getElementById("submit").addEventListener("click", function(e) {
+        e.preventDefault();
+        if (e.target.getAttribute("disabled")) {
+            return;
+        }
+
+        var handler = StripeCheckout.configure({
+            name: your_name,
+            key: window.stripe_key,
+            locale: 'auto',
+            description: "Invoice " + invoice,
+            panelLabel: "Pay {{amount}}",
+            amount: amount,
+            token: function(token) {
+                e.target.setAttribute("disabled", "");
+                e.target.textContent = "Submitting...";
+
+                var data = new FormData();
+                data.append("stripe_token", token.id);
+                data.append("email", token.email);
+                data.append("amount", amount);
+                data.append("type", "once");
+                data.append("comment", comment);
+                var xhr = new XMLHttpRequest();
+                xhr.open("POST", "../donate");
+                xhr.onload = function() {
+                    var res = JSON.parse(this.responseText);
+                    if (res.success) {
+                        document.getElementById("donation-stuff").classList.add("hidden");
+                        document.getElementById("thanks").classList.remove("hidden");
+                    } else {
+                        var errors = document.getElementById("errors");
+                        errors.classList.remove("hidden");
+                        errors.querySelector("p").textContent = res.reason;
+                        e.target.removeAttribute("disabled");
+                        e.target.textContent = "Submit payment";
+                    }
+                };
+                xhr.send(data);
+            }
+        });
+
+        handler.open();
+    });
+})();
+