Javascript expression for validating multiple email addresses

regexp, javascript only (not perl/cgi), validation

[Garoun]

I am working on an emailing routine for a project I'm doing and currently have a problem using a javascript regular expression to check for certain criteria.

Sample Input:

[e-mail];[e-mail]@test.com
-------
Criteria to be met:

1) If there is only one '@' is present then I assume it is only one email address and run it through my address validater
2) If more then one '@' is present then there must be a ';' between each them (aka @*;*@ where * = any amount/type of character)
3) If there is more then one instance then the check must ensure that there is always a ';' between each pair of '@'
-------
Examples:

a@b.c = true
[e-mail]@e.f = false
a@b.c;d@e.f = true
a@b.c;[e-mail].h@j = false
[e-mail]@e.f;g@h.i = false
a@b.c;d@e.f;g@h.i = true

Thanks in advance.

[dcrombie]

I would first explode the string on ';' and then check that each element in the array is a valid email address.

;)

[adni18]

...or you might want to try [javascript.internet.com...]