[jdev] how to automatically subscribe?

[jiyanbao at gmail.com]

Hi everyone,
	I'm developing an online customer service system, because the customer need to know the visitor's status (in jabber,that is presence type: chat/away...), owning to reduce the steps in the whole process, so, I want to achieve a way that the visitor will automatically accept subscribe request from customer , how do that?   Or there is a better way to achieve this purpose?
	thanks.