need classsic asp code to maintain cookies value in a common domain

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need classsic asp code to maintain cookies value in a common domain

I have explained in brief

suppose,i have logged in www.sample.net domain,
the cookie value is stored like this
Response.Cookies("login_email") ="test"

now i have opened a page in www.sample.com domain,
in this domain also, the cookie value must be there.here i donot want to login again,
becoz cookie value has to maintain.

and opened a page in www.sample.biz domain,here also i have to maintain that cookie value.

ie. when i write a cookie in one domain, it must be reflected to other domains also.
kindly help me.