The display and hiding of JavaScript implementation information

Source: Internet
Author: User

The display and hiding of information are sometimes used in comparison, such as registration information, there is a good example below, interested friends can understand

When we write the registration page, the required information is visible, the optional information is hidden, and if the user wants to fill out, you can click "Details". The code is as follows: <!--The following code implements the display and hiding of information through JavaScript--> <!  DOCTYPE html>
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