How can I iterate over cookies using jquery (or just javascript)?

I am using the "Cookie Plugin" by Klaus Hartl to add or update cookies at $(document).ready. I have another event that is supposed to iterate all the cookies and do something with the value of each cookie. How can I iterate over the collection of cookies and get the id and value of each?

I'm thinking something like this:

$.cookie.each(function(id, value) { 
            alert('ID='+id+' VAL='+value); 
        });