Quote:
function emailCheck(e)
{
* * * * var emailStr;
* * * * emailStr = e;
* * * * valid = true;
>
* * * * var checkTLD=0;
* * * * var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|
coop|info|pro|museum|uk|se)$/;
* * * * var emailPat=/^(.+)@(.+)$/;
* * * * var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
* * * * var validChars="\[^\\s" + specialChars + "\]";
* * * * var quotedUser="(\"[^\"]*\")";
* * * * var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
* * * * var atom=validChars + '+';
* * * * var word="(" + atom + "|" + quotedUser + ")";
* * * * var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
* * * * var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
* * * * var matchArray=emailStr.match(emailPat);
>
* * * * if (matchArray==null)
* * * * {
* * * * * * * * //alert("The email address is invalid");
* * * * * * * * valid = false;
* * * * }else
* * * * {
* * * * * * * * var user=matchArray[1];
* * * * * * * * var domain=matchArray[2];
>
* * * * * * * * for (i=0; i<user.length; i++)
* * * * * * * * {
* * * * * * * * * * * * if (user.charCodeAt(i)>127)
* * * * * * * * * * * * {
* * * * * * * * * * * * * * * * //alert("The username contains invalid Characters.");
* * * * * * * * * * * * * * * * valid =false;
* * * * * * * * * * * * }
* * * * * * * * }
* * * * * * * * for (i=0; i<domain.length; i++)
* * * * * * * * {
* * * * * * * * * * * * if (domain.charCodeAt(i)>127)
* * * * * * * * * * * * {
* * * * * * * * * * * * * * * * //alert("The domain dame contains invalid characters.");
* * * * * * * * * * * * * * * * valid =false;
* * * * * * * * * * * * }
* * * * * * * * }
* * * * * * * * if (user.match(userPat)==null)
* * * * * * * * {
* * * * * * * * * * * * //alert("The username is invalid.");
* * * * * * * * * * * * valid = false;
* * * * * * * * }
>
* * * * * * * * var IPArray=domain.match(ipDomainPat);
* * * * * * * * if (IPArray!=null)
* * * * * * * * {
* * * * * * * * * * * * for (var i=1;i<=4;i++)
* * * * * * * * * * * * {
* * * * * * * * * * * * * * * * if (IPArray[i]>255)
* * * * * * * * * * * * * * * * {
* * * * * * * * * * * * * * * * * * * * //alert("The destination IP address is invalid.");
* * * * * * * * * * * * * * * * * * * * valid = false;
* * * * * * * * * * * * * * * * }
* * * * * * * * * * * * }
>
* * * * * * * * }
* * * * * * * * var atomPat=new RegExp("^" + atom + "$");
* * * * * * * * var domArr=domain.split(".");
* * * * * * * * var len=domArr.length;
* * * * * * * * for (i=0;i<len;i++)
* * * * * * * * {
* * * * * * * * * * * * if (domArr[i].search(atomPat)==-1)
* * * * * * * * * * * * {
* * * * * * * * * * * * * * * * //alert("The domain name is invalid.");
* * * * * * * * * * * * * * * * valid =false;
* * * * * * * * * * * * }
* * * * * * * * }
* * * * * * * * if (checkTLD && domArr[domArr.length-1].length!=2 &&
domArr[domArr.length-1].search(knownDomsPat)==-1)
* * * * * * * * {
* * * * * * * * * * * * //alert("The domain name extension is invalid");
* * * * * * * * * * * * valid = false;
* * * * * * * * }
* * * * * * * * if (len<2)
* * * * * * * * {
* * * * * * * * * * * * //alert("The address is missing a hostname.");
* * * * * * * * * * * * valid = false;
* * * * * * * * }
* * * * }
* * * * return valid;
>
}
Nice code.
directory separator to store mail.
valid LAN-hostnames).
' etc. are wrong; those signs
are not allowed in domain names.
The condition " if (myvar.charCodeAt(i)>127) { ... " is probably too
broad; lots of <127 characters are not allowed too.
anyhow).
All a bit academic though. Note that Windows Hotmail only allows
address. In practice I would probably use such a "real-world"
criterion as well.
