I'm using VisualForce page to generate pdf, has anyone successfully added footer to pdf?

I've tried the solution below by using @page stylesheet, but with no luck, the footer element is basically disappeared.

http://help.salesforce.com/apex/HTViewSolution?id=000003705&language=en_US

In Product object, we have a custom field 'Product Group', it's a picklist.

Product data are imported from an external application, and there could be new Product Group added at any time. Our customer requested us to pupulate new Product Group to the picklist during the data import when the value is new.

I'm planning to create a trigger to the Product object, and check whehter the Product Group exists in the picklist, if not, add it in. I've read some threads that metadata api might be able to do this job, but i can't find any documentation or sampel code for this, any help is appreciated.

In Product object, we have a custom field 'Product Group', it's a picklist.

Product data are imported from an external application, and there could be new Product Group added at any time. Our customer requested us to pupulate new Product Group to the picklist during the data import when the value is new.

I'm planning to create a trigger to the Product object, and check whehter the Product Group exists in the picklist, if not, add it in. I've read some threads that metadata api might be able to do this job, but i can't find any documentation or sampel code for this, any help is appreciated.