版本：1.0.3
- https://cdn.bootcdn.net/ajax/libs/Ladda/1.0.3/ladda-themeless.min.css
- https://cdn.bootcdn.net/ajax/libs/Ladda/1.0.3/ladda.jquery.min.js
- https://cdn.bootcdn.net/ajax/libs/Ladda/1.0.3/ladda.min.css
- https://cdn.bootcdn.net/ajax/libs/Ladda/1.0.3/ladda.min.js
- https://cdn.bootcdn.net/ajax/libs/Ladda/1.0.3/spin.min.js