frontend: check in html, css, js

frontend/js/auth-common.js

@@ -0,0 +1,11 @@
+(function (global, document) {
+
+  // Prefills the email field from the URL parameter.
+  global.prefillEmail = function() {
+    if (paramGet("email") != undefined) {
+      $("#email").val(paramGet("email"));
+      $("#password").click();
+    }
+  };
+
+} (window, document));