
method nameing rules
--------------------

+ new...
	The "new..." method is allocate, initialize and do some operaration
	for new object. The result is the pointer of the new object.
	If some errors are occured while generating new object,
	some error message is sent to the system.

- reinit
	Re-initialize the object. After calling of this method, the object's
	status is same when the object execute the "init" method after the
	allocation

