// Email Validation Javascript
// copyright 23rd March 2003, by Stephen Chapman, Felgall Pty Ltd

// You have permission to copy and use this javascript provided that
// the content of the script is not changed in any way.

// Steve - minor wording changes

function validateEmail(addrfield,man,db) {
var addr = addrfield.value	
if (addr == null || addr == '' && man) {
   if (db) alert('You must enter an email address');
   addrfield.focus();
   return false;
}
if (addr == '') return true;
var invalidChars = '\/\'\\ ";:?!()[]\{\}^|';
for (i=0; i<invalidChars.length; i++) {
   if (addr.indexOf(invalidChars.charAt(i),0) > -1) {
      if (db) alert('Your email address contains invalid characters');
	  addrfield.focus();
      return false;
   }
}
for (i=0; i<addr.length; i++) {
   if (addr.charCodeAt(i)>127) {
      if (db) alert("Your email address contains non-printable characters.");
      addrfield.focus();
      return false;
   }
}

var atPos = addr.indexOf('@',0);
if (atPos == -1) {
   if (db) alert('Your email address must contain an @');
   addrfield.focus();
   return false;
}
if (atPos == 0) {
   if (db) alert('Your email address must not start with @');
   addrfield.focus();
   return false;
}
if (addr.indexOf('@', atPos + 1) > - 1) {
   if (db) alert('Your email address must contain only one @');
   addrfield.focus();
   return false;
}
if (addr.indexOf('.', atPos) == -1) {
   if (db) alert('Your email address must contain a dot (.) in the domain name');
   addrfield.focus();
   return false;
}
if (addr.indexOf('@.',0) != -1) {
   if (db) alert('A dot (.) must not immediately follow @ in the email address');
   addrfield.focus();
   return false;
}
if (addr.indexOf('.@',0) != -1){
   if (db) alert('A dot (.) must not immediately precede @ in the email address');
   addrfield.focus();
   return false;
}
if (addr.indexOf('..',0) != -1) {
   if (db) alert('Two dots (..) must not be adjacent in the email address');
   addrfield.focus();
   return false;
}
var suffix = addr.substring(addr.lastIndexOf('.')+1);
if (suffix.length != 2 && suffix != 'com' && suffix != 'net' && suffix != 'org' && suffix != 'edu' && suffix != 'int' && suffix != 'mil' && suffix != 'gov'  && suffix != 'tel' && suffix != 'arpa' && suffix != 'biz' && suffix != 'aero' && suffix != 'name' && suffix != 'coop' && suffix != 'info' && suffix != 'pro' && suffix != 'asia' && suffix != 'jobs' && suffix != 'mobi' && suffix != 'travel' && suffix != 'museum') {
   if (db) alert('Invalid primary domain in email address : ' + suffix);
   addrfield.focus();
   return false;
}
return true;
}