NameVirtualHost *:80

<VirtualHost xxx.xxx.xxx.xxx:80>
    NameVirtualHost www.myhost.com:80
    ServerAlias www.myhost.com myhost.com
    DocumentRoot /var/www/html
    ServerName www.myhost.com:80
</VirtualHost>

<VirtualHost xxx.xxx.xxx.xxx:80>
    NameVirtualHost www.myhost2.com:80
    ServerAlias www.myhost2.com myhost2.com
    DocumentRoot /var/www/host2
    ServerName www.myhost2.com:80
</VirtualHost>