版本：1.0.4
- https://cdn.bootcdn.net/ajax/libs/Ladda/1.0.4/ladda-themeless.min.css
- https://cdn.bootcdn.net/ajax/libs/Ladda/1.0.4/ladda.jquery.min.js
- https://cdn.bootcdn.net/ajax/libs/Ladda/1.0.4/ladda.min.css
- https://cdn.bootcdn.net/ajax/libs/Ladda/1.0.4/ladda.min.js
- https://cdn.bootcdn.net/ajax/libs/Ladda/1.0.4/spin.min.js