diff --git a/lib/6to5/browser.js b/lib/6to5/browser.js
index 089a195e9b..fb7561ca57 100644
--- a/lib/6to5/browser.js
+++ b/lib/6to5/browser.js
@@ -14,6 +14,92 @@ Error.captureStackTrace = Error.captureStackTrace || function (obj) {
   }
 };
 
-exports = module.exports = require("./transform");
-exports.transform = exports;
-exports.generate = require("./generator");
+var transform = module.exports = require("./transform");
+var generate  = require("./generator");
+
+transform.transform = transform;
+transform.generate  = generate;
+
+transform.eval = function (code, opts) {
+  opts = opts || {};
+  opts.filename = opts.filename || "eval";
+  opts.sourceMap = "inline";
+  return eval(transform(code, opts).code);
+};
+
+transform.run = function (code, opts) {
+  opts = opts || {};
+  opts.sourceMap = "inline";
+  return Function(transform(code, opts).code)();
+};
+
+transform.load = function (url, callback, opts, hold) {
+  opts = opts || {};
+  opts.filename = opts.filename || url;
+
+  var xhr = window.ActiveXObject ? new window.ActiveXObject("Microsoft.XMLHTTP") : new window.XMLHttpRequest();
+  xhr.open("GET", url, true);
+  if ("overrideMimeType" in xhr) xhr.overrideMimeType("text/plain");
+
+  xhr.onreadystatechange = function() {
+    if (xhr.readyState !== 4) return;
+
+    var status = xhr.status;
+    if (status === 0 || status === 200) {
+      var param = [xhr.responseText, options];
+      if (!hold) transform.run.apply(transform, param);
+      if (callback) callback(param);
+    } else {
+      throw new Error("Could not load " + url);
+    }
+  };
+
+  xhr.send(null);
+};
+
+var runScripts = function () {
+  var scripts = [];
+  var types   = ["text/ecmascript-6"];
+  var index   = 0;
+
+  var execute = function () {
+    var param = scripts[index];
+    if (param instanceof Array) {
+      transform.run.apply(transform, param);
+      index++;
+      execute();
+    }
+  };
+
+  var run = function (script, i) {
+    var opts = {};
+
+    if (script.src) {
+      transform.load(script.src, function(param) {
+        scripts[i] = param;
+        execute();
+      }, opts, true);
+    } else {
+      opts.filename = "embedded";
+      scripts[i] = [script.innerHTML, opts];
+    }
+  };
+
+  var _scripts = window.document.getElementsByTagName("script");
+  for (var i in _scripts) {
+    var _script = _scripts[i];
+    if (types.indexOf(_script.type) >= 0) scripts.push(_script);
+  }
+
+  for (var i in scripts) {
+    run(scripts[i], i);
+  }
+
+  execute();
+};
+
+if (window.addEventListener) {
+  window.addEventListener("DOMContentLoaded", runScripts, false);
+} else {
+  window.attachEvent("onload", runScripts);
+}