diff --git a/www/_socket/typingTest.js b/www/_socket/typingTest.js
new file mode 100644
index 000000000..4edc9d142
--- /dev/null
+++ b/www/_socket/typingTest.js
@@ -0,0 +1,64 @@
+define(function () {
+    var setRandomizedInterval = function (func, target, range) {
+        var timeout;
+        var again = function () {
+            timeout = setTimeout(function () {
+                again();
+                func();
+            }, target - (range / 2) + Math.random() * range);
+        };
+        again();
+        return {
+            cancel: function () {
+                if (timeout) {
+                    clearTimeout(timeout);
+                    timeout = undefined;
+                }
+            }
+        };
+    };
+
+    var testInput = function (el, offset, cb) {
+        var i = 0,
+            j = offset,
+            input = "The quick red fox jumps over the lazy brown dog. ",
+            l = input.length,
+            errors = 0,
+            max_errors = 15,
+            interval;
+        var cancel = function () {
+            if (interval) { interval.cancel(); }
+        };
+
+        interval = setRandomizedInterval(function () {
+            cb();
+            try {
+                el.replaceData(j, 0, input.charAt(i));
+            } catch (err) {
+                errors++;
+                if (errors >= max_errors) {
+                    console.log("Max error number exceeded");
+                    cancel();
+                }
+
+                console.error(err);
+                var next = document.createTextNode("");
+                window.inner.appendChild(next);
+                el = next;
+                j = 0;
+                return;
+            }
+            i = (i + 1) % l;
+            j++;
+        }, 200, 50);
+
+        return {
+            cancel: cancel
+        };
+    };
+
+    return {
+        testInput: testInput,
+        setRandomizedInterval: setRandomizedInterval
+    };
+});