regex - Javascript lookbehind stopped at the first match -

i have parse (in js) e-mail address originally, instead of @ has dot. want show @ instead of dot.

var mail = "name.domain.xx" 

we have 2 cases:

1. name contains dots , backslashed:

   name\.surname.domain.xx 

2. name contains regular characters (non dots)

in this topic found way implement negative lookbehind , did:

mail = mail.replace(/(\\)?\./, function ($0, $1) { return $1?$0:"@"; }); 

but it's not working because in case (1) finds \., not touch it, , of course stops.

on other end, if use option g, substitute third dot obtaining name.surname@domain@xx

now, there way say: want in whole string want stop in first match? hope explained myself.

cheers

i misunderstood when first answering question. have changed answer.

if don't put /g flag, replace first match, meaning can first punctuation without \ in front of it. second can replace \. belonging user part of email regular punctuation.

http://jsfiddle.net/glvny/2/

var emailsingle = 'myname.domain.com',     emaildouble = 'my\\.name\\.another\\.name.domain.com',     regat = /([^\\])\./,     repat = '$1@',     regpunct = /\\./g,     reppunct = '.';  emailsingle = emailsingle.replace(regat, repat).replace(regpunct, reppunct); emaildouble = emaildouble.replace(regat, repat).replace(regpunct, reppunct);  alert('emailsingle: ' + emailsingle + '\nemaildouble: ' + emaildouble);