//
// This code is protected by Copyright 2001 - 2002 GoGlobal Technologies Inc.
//  
// version 4.02		updated 276/01/2003
//

function emailCheck (emailStr) {
var checkTLD=1;
var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
var emailPat=/^(.+)@(.+)$/;
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("You have entered an invalid Email address. Please correct and try again");
  return false;
}
var user=matchArray[1];
var domain=matchArray[2];

for (i=0; i<user.length; i++) {
  if (user.charCodeAt(i)>127) {
    alert("The first part of your email address appears to contain invalid characters. Please try again.");
    return false;
   }
}
for (i=0; i<domain.length; i++) {
  if (domain.charCodeAt(i)>127) {
    alert("The second half of your email address appears to contain invalid characters (the Domain Name portion). Please try again.");
    return false;
   }
}

// See if "user" is valid 

if (user.match(userPat)==null) {
  alert("The username doesn't seem to be valid.");
  return false;
}

var IPArray=domain.match(ipDomainPat);
if (IPArray!=null) {

for (var i=1;i<=4;i++) {
  if (IPArray[i]>255) {
    alert("Destination IP address is invalid!");
    return false;
   }
}
return true;
}

// Domain is symbolic name.  Check if it's valid.
 
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 does not seem to be valid.");
    return false;
   }
}

if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) {
  alert("The address must end in a well-known domain or two letter " + "country.");
  return false;
}

if (len<2) {
  alert("This address is missing a hostname!");
  return false;
}

return true;
}