validatin an email

i am validating an email using :

[code=php]str.match(/([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+.[a-zA-Z0-9._-]+)/gi);[/code]

but what i do if i have an email like this :

[QUOTE]

[email protected]

[/QUOTE]

which means 2 dots (.) and not 1?
how do i handle the cases of 1 or 2 dots in the email
thnaks in advance
peleg

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