How do I mirror MS SQL 2005 Express databases to a MS SQL 2012 server Standard?

I am in the process of migrating a server containing several IIS 7.0 sites along with their associated MS SQL 2005 Express databases to a faster server running SQL 2012 and IIS 8. The current server is running Win Server 2008 R2 and the new one will be running Win Server 2012.

Is there an automated built in facility to mirror the databases between the two servers to minimize or eliminate downtime and data loss? Microsoft's documentation is quite confusing about how to do this.