HOWTO use Storage API in your content.

Include the following JavaScript function in your content:
--------------------javascript code--------------------
function FindSTAPI(win) {
	var g_nFindAPITries = 0;
	while ((win.STAPI == null) && (win.parent != null) && (win.parent != win)) {
		g_nFindAPITries ++;
		if (g_nFindAPITries > 500) {
			return null;
		}
		win = win.parent;
	}
	return win.STAPI;
}
--------------------javascript code--------------------

This function returns a facade object which has the following methods :

- testCall(message) : outputs message in an alertbox, you can use it to make sure the API is reachable
- getAllUsers : get a list of users info (user ids, usernames, firstnames, lastnames)

Basic storage:
- setValue(sv_key, sv_value): set the given value for the given key for the current user
- getValue(sv_key): get the value stored for the key sv_key for the current user
- getAll(): get all stored key/values pair for the current user

Stack storage (you can store a stack of values instead of a single value for each key):
- stack_push(sv_key, sv_value): push a new value in the stack for sv_key for the current user
- stack_pop(sv_key): pop the most recently pushed value from the sv_key stack for the current user
- stack_length(sv_key): get the number of stacked values for the key sv_key for the current user
- stack_clear(sv_key): erase all values from the storage stack for the key sv_key for the current user
- stack_getAll(sv_key): get all values from the storage stack for the key sv_key for the current user

These storage values have superuser counterparts which allow platform administrators to alter values for any user :
- setValue_user(sv_key, sv_value, user_id)
- getValue(sv_key, user_id)
- getAll(user_id)
- stack_push(sv_key, sv_value, user_id)
- stack_pop(sv_key, sv_value, user_id)
- stack_length(sv_key, user_id)
- stack_clear(sv_key, user_id)
- stack_getAll(sv_key, user_id)