Install Quick Image Preview plugin to TinyMCE

1. Unpack archived files directly to tinymce/plugins.
2. Turn on the plugin in initialization script:

   plugins: 'jsplus_preview'

3. Add these buttons to the toolbar definition:
   • jsplus_preview
   See sample TinyMCE toolbar configuration manual.
4. Now you can use your installed plugins. Do not forget to sure that browser cache was cleared.