UTM

script.js

@@ -57,7 +57,33 @@ var si = 0,
         return data;
     }
 
-    window.UTM = { parse: parseUTM, getStored: getStoredUTM, inject: injectUTM };
+    function appendToForm(form) {
+        var stored = getStoredUTM();
+        var keys = ['source', 'medium', 'campaign'];
+        for (var i = 0; i < keys.length; i++) {
+            if (stored[keys[i]]) {
+                var input = document.createElement('input');
+                input.type = 'hidden';
+                input.name = 'utm_' + keys[i];
+                input.value = stored[keys[i]];
+                form.appendChild(input);
+            }
+        }
+    }
+
+    function toQuery() {
+        var stored = getStoredUTM();
+        var parts = [];
+        var keys = ['source', 'medium', 'campaign'];
+        for (var i = 0; i < keys.length; i++) {
+            if (stored[keys[i]]) {
+                parts.push('utm_' + keys[i] + '=' + encodeURIComponent(stored[keys[i]]));
+            }
+        }
+        return parts.join('&');
+    }
+
+    window.UTM = { parse: parseUTM, getStored: getStoredUTM, inject: injectUTM, appendToForm: appendToForm, toQuery: toQuery };
     window.UTM.parse(); // Parse on page load
 })();
 
@@ -196,13 +222,15 @@ var si = 0,
                 yearlySave.style.display = "block";
                 var buyBtn = document.getElementById("orderBuyBtn");
                 var loc = document.getElementById("orderServerLocation").value;
+                var utmQuery = UTM.toQuery();
                 buyBtn.href =
                     "/3/" +
                     price.toFixed(2) +
                     "/4/" +
                     encodeURIComponent(plan) +
                     "?location=" +
-                    encodeURIComponent(loc);
+                    encodeURIComponent(loc) +
+                    (utmQuery ? "&" + utmQuery : "");
                 widget.style.display = "flex";
                 orderPopupShown = true;
             }
@@ -233,13 +261,15 @@ var si = 0,
                         .trim();
                     var price = parseFloat(priceText);
                     var loc = this.value;
+                    var utmQuery = UTM.toQuery();
                     document.getElementById("orderBuyBtn").href =
                         "/3/" +
                         price.toFixed(2) +
                         "/4/" +
                         encodeURIComponent(plan) +
                         "?location=" +
-                        encodeURIComponent(loc);
+                        encodeURIComponent(loc) +
+                        (utmQuery ? "&" + utmQuery : "");
                 });
             function applyCoupon() {
                 var input = document.getElementById("orderCouponInput");
@@ -719,6 +749,7 @@ var si = 0,
                 clear.name = 'clear';
                 clear.value = '1';
                 form.appendChild(clear);
+                UTM.appendToForm(form);
                 document.body.appendChild(form);
                 form.submit();
                 document.body.removeChild(form);