How to register a button after 10 seconds in javascript _ javascript skills

This article describes how to register and click a button in ten seconds after javascript is implemented. it involves related techniques related to javascript time and style operations, if you need it, refer to the example in this article to describe how to register the button and click it 10 seconds after javascript is implemented. Share it with you for your reference. The specific analysis is as follows:

1. the initial status of the registration button is unavailable, disabled
2. start the timer, setInterval, and run the CountDown method once every second to set a global variable with an initial value of 10,
In the CountDown method, calculate the global variable reciprocal and write the reciprocal value to the registration button (read the protocol carefully (8 seconds left )).
3. make the registration button available until the value of the global variable is <= 0. set the text of the button to "agree! "