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function callEmailCheck() {
2
var emailreg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
3
//useremail is the name of the email text field.
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var email = document.getElementById("useremail").value;
5
if(emailreg.test(email) == true){
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return email;
7
}
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return "";
9
}



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http://katharnavas.wordpress.com/2009/10/20/email-validation-using-php-and-javascript/

This is a script for a validating Email.

Validating email

email, php

PHP