Cookies are often confusing. Much of the confusion can be eliminated if you know that all cookies are strings. If you want to store an array, function, number, or an object in a cookie, you must convert it to a string before storage and upon retrieval change it back into the object/array/function/number that it was. Cookies are therefore best used for string storage and retrieval. This unit doesn't pretend to eliminate all of the possible confusions that can arise from "when and where in...