point existing domain to altervista host

I need to point my domain purchased on Weebly to the location of the new site in Altervist. I need either Nameservers, IP Addresses / A-Records or CNAME Records that enable me to make this change.
how can I have these information on altervista?
thanks

[Gianluca]

You can do it but AlterVista currently doesn't provide any vhost service for domain purchased elsewhere. You should instead make a redirect from your current website to the new one hosted by AlterVista.