Validation for multiple email addresses

[dushyant1244]

I am using a validation engine which is using a validation.xml and checking the email pattern as

<field name="emailAddress">
<validation type="required">
<errorKey>emailAddress.requiredField</errorKey>
</validation>
<validation type="emailPattern">
<errorKey>emailAddress.invalid</errorKey>
</validation>
</field>

but it is checking for one email only. How to add for multiple emails.

Please help me out in this

Thanks
Dushyant