erp5_notebook: small fixing

bt5/erp5_notebook/SkinTemplateItem/portal_skins/erp5_notebook/gadget_jsmd_eval.js.js

@@ -80,9 +80,10 @@
     function pushNewCell() {
       if (current_type !== undefined) {
         option = current_header.slice(current_type[0].length);
-        if (option !== '') {
-          option = JSON.parse(option);
+        if (option === '') {
+          option = '{}';
         }
+        option = JSON.parse(option);
 
         cell_list.push(new JSMDCell(current_type[1],
                                       current_text_list, option));
@@ -263,12 +264,12 @@
     });
   }
 
-  function executeCodeCell(line_list, language) {
-    if (language === 'py') {
+  function executeCodeCell(line_list, option) {
+    if (option.language === 'py') {
       console.log(line_list);
       console.log("We are processing Python code!!!");
     } else {
-      throw new Error('Unsupported code language: ' + language);
+      throw new Error('Unsupported code language: ' + option.language);
     }
   }
 
@@ -293,7 +294,7 @@
       return executeCssCell(cell._line_list);
     }
     if (cell._type === 'code') {
-      return executeCodeCell(cell._line_list, cell._option.language);
+      return executeCodeCell(cell._line_list, cell._option);
     }
     return executeUnknownCellType(cell);
   }