make code better understandable

gadget_json_generated_form.js

@@ -109,23 +109,23 @@
     return schema;
   }
 
-  function render_selection(json_field, default_value) {
+  function render_selection(schema, json_document) {
     var input = document.createElement("select"),
       option = document.createElement("option"),
       option_index,
       optionz;
     input.size = 1;
     option.value = "";
-    if (default_value === undefined) {
+    if (json_document === undefined) {
       option.selected = "selected";
     }
     input.appendChild(option);
-    for (option_index in json_field['enum']) {
-      if (json_field['enum'].hasOwnProperty(option_index)) {
+    for (option_index in schema['enum']) {
+      if (schema['enum'].hasOwnProperty(option_index)) {
         optionz = document.createElement("option");
-        optionz.value = json_field['enum'][option_index];
-        optionz.textContent = json_field['enum'][option_index];
-        if (json_field['enum'][option_index] === default_value) {
+        optionz.value = schema['enum'][option_index];
+        optionz.textContent = schema['enum'][option_index];
+        if (schema['enum'][option_index] === json_document) {
           optionz.selected = "selected";
         }
         input.appendChild(optionz);