Questions on the usage of _deleteCustomVar()
问题 We have done some visitor level custom variables on our website (we used all indexes from 1 to 5), and now we are using index 1 for another custom variable name (no code to set custom variable to the previous variable name), but we encountered a problem: we still see few data for the previous custom variable name. We think it should because the previous custom variable name of index 1 is still saved in the cookie of some user's browsers. So we find the function _deleteCustomVar(index) which