Layui the drop-down menu of event monitor, implement and display the hidden elements

Not the css! Not css! Not the css!
The very beginning has tried many methods, such as onchange, change will not only be achieved hide and show on the page, but the project can not be achieved
Layui need to add a lay-filter attribute

Js files

Jquery the hide () represent hide, show () denotes a display, there is a toggle () represents the show and hide the
document links: https://www.jquery123.com/category/effects/basics/
PS: What's wrong with exhibitions