Help input javascript

Hi Sir,

Thank you very much for this plugin!

I am trying to make it work for me, but I know very little of coding. I have the plugin installed and activated. But it does not work. I guess I have to input add the JavaScrip into the custom field. But how do I get a list of them???

Thanks a lot,

Jose

https://www.ads-software.com/plugins/instantclick/