javascript perfect random advertising code_advertising code

If you need to randomly display pictures or link banners on your homepage, how do you implement it?
The following is a code to randomly display five Banners, which you can define yourself.
Code:

Copy code The code is as follows:

If some pictures such as advertising are on Do I need to join the corresponding connection? Then the code is still similar:

Code:

[Ctrl A select all Note: If you need to introduce external Js, you need to refresh to execute

]