I want to Website to accept: "User select skin they want (ex: a widget of css in top page or skin, they select and Website save this option as Favorite) . After log in again, Website 'll load that option appropriate with each user". How do i resolve ?

 What i want Website can save information about skin or css with each register user. Anytime user log in again, Website auto load skin or css for that user, not need click to widget.

User profile has a "favorite skin" field. I have a widget for user can choose a skin, and a check box that a  register user can check is  "set a favorite skin". Website save name of skin or path skin into "favorite skin" field.When a user log in, Website get content from that field and load skin for user. Here is some method i think:
+ How to set skin or style sheet, not set in admin page or host page. I think it's difficult if it is skin, but if it is a path of style sheet in skin package as when using widget, this may be do. But i don't know how to set as that?
+ That matter as similar as you save information about the select style sheet on widget  of each user into a field of user profile. And when user log in, Website load that selection and set selected data on widget.
i think it's two way for resolve. But i don't know how to do that?