Not sure I understand what you mean, but if so...
You could probably change the reg expression on the validator.
This is what I use for email validation:
Code:
emailRe = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*\.(\w{2}|(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum))$/;
I made up a button to check yours vs both of the reg expressions and the test_test@ comes out false with the validator and true with the one I use.
Code:
var value="A.test@test.com";
//var value="test_test@test.com";
alert((/^[a-zA-Z0-9]+([\.-]?[a-zA-Z0-9]+)*@[a-zA-Z0-9]+([\.-]?[a-zA-Z0-9]+)*(\.\w{2,5})+$/).test(value));
emailRe = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*\.(\w{2}|(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum))$/;
if (!emailRe.test(value))
{
alert(value + ' is invalid');
return(false);
}
alert(emailRe.test(value));