>Hello All,
>
>We are also hosting our email and webserver in the office and we would like it so when our primary ISP goes offline clients can still access our website and mail server.
>
>How I imagine we would do this is have two IP addresses registered for each service (example):
>
>Website: 212.212.212.212
> 64.64.64.64
>
>mail: 212.212.212.213
> 64.64.64.65
>
>At the domain registrar level have DNS1 pointing to dns server at primary ISP and have DNS2 pointing to backup ISP dns.
>
>Is this correct? If not am I close? Does any one know of any good materials on doing something like this?

You should be talking to whoever controls your NS records... for email servers, check the MX tag (you can have one or more email servers) as to the webserver, I'm sure you can do it with DNS too, as there are sites out there that do what you want (i.e. microsoft.com)