javascript - Trigger Checkbox using HREF different Page

one text

Solution:

With document.referrer you can check how the user navigated to the page and if the user comes from your page you can activate the checkbox.

var referrer = document.referrer;
if(referrer == 'https://yourDomain.com/PageWhereTheUserShouldComeFrom.html'){
    document.getElementById("checkToys").checked = true;
}