Prepare

Don't forget to paste the html codes of modals on the html page you want to use.

Show everytime

You can show with AddtoHome(); javascript code.

Show after a delay

You can set the delay to show the modal. AddtoHome("3000");
This code shows the modal after 3 seconds. Change according to what you want.

Show only once

Show the modal only once to users. AddtoHome(3000, "once");
This code shows the modal after 3 seconds. it works only once, does not disturb users. Note: you must define the delay, otherwise It will not work.