sorry for my poor english, but when I use the reg in the book like follow:
//check email.
function emailCheck(email) {
    var reEmail = /^(?:\w+\.?)*\w+@(?:\w+\.?)*\w+$/;
    return reEmail.test(email);
}
if the email's value less than 15 ,it will be fime,but if not it'll get wrong. Anyone can help me? thanks very much.

Hi,

I'd like to help, but I can't understand your problem from the description. Perhaps if you can paste in some code of what you're seeing, that would help.

Nicholas C. Zakas
Author, Professional JavaScript for Web Developers (ISBN 0764579088)
http://www.nczonline.net/