Implementation of tree menu display in the javascript drop-down list _ javascript skills

This article mainly introduces how to display the tree menu in the javascript drop-down list. For more information, see click a menu to display the following or not.
1. Main purpose:A menu item is displayed. Click it to hide it. Click it to display the following content.

The overflow: hidden and overflow = "visible" attributes are used in the clicked function.

Node. style. overflow = "visible"; of course, setting the height of tr is also very important, so that other options should be hidden.

2. Adopt the same technologyBut it is troublesome to pass parameters.This parameterVery common

Effect:

     List.html