username as email default when logged in

static/js/order.js

@@ -17,6 +17,11 @@ function validate(what, text) {
 }
 
 $(document).ready(function () {
+  var username = $("#username").html();
+  if (username != "") {
+    $("#email").val(username);
+  }
+  console.log(username);
   $("#quantity_exclamation").hide();
   $("#email_exclamation").hide();