There are some global constants that are always available to you on every page of codoforum.
All these variables are stored in a variable named 'codo_defs'.
codo_defs = {
url //URL to the codoforum index
duri //URL to the data directory i.e sites/default
def_theme //URL to the 'default' theme NOT current theme
logged_in //'yes' -> logged in; else -> 'no'
token //token to be used with forms or AJAX requests for CSRF
uid //userid of user. if guest it will be '0'
}