I have written an actionFunction which has a callback function. The function is working when I am logged in to Salesforce.
It's not working when I am logged out. I have given all permissions to guest profile. 

 

I want to know how I can share multiple records at a time . Individual records can be shared by clicking the Sharing button in the record's detail page, but I want to do sharing of multiple records (with same sharing criteria) at a time in the site and not in apex code.