What are the regulations for unemployment benefits in Spain?

A Spanish citizen friend of mine wants to visit the United States. She tells me that she cannot stay out of Spain for more than 9 days or she will lose her benefits. I found a reference to an "Activity Agreement", which means that one must be actively seeking employment to remain eligible for benefits. I think this agreement has something to do with the 9 day restriction, but I cannot find any specific reference to any foreign travel restrictions.

I would like to see an official Spanish government website that lists the regulations for unemployment benefits, so if you know of any, please include them in your answer.

Gracias!