// 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.

function validateEmail(addr,man,db) {
    if (addr == '' && man) {
       if (db) alert('Email address is mandatory');
       return false;
    }
    var invalidChars = '\/\'\\ ";:?!()[]\{\}^|';
    for (i=0; i<invalidChars.length; i++) {
       if (addr.indexOf(invalidChars.charAt(i),0) > -1) {
          if (db) alert('Email address contains invalid characters');
          return false;
       }
    }
    for (i=0; i<addr.length; i++) {
       if (addr.charCodeAt(i)>127) {
          if (db) alert("Email address contains non ascii characters.");
          return false;
       }
    }

    var atPos = addr.indexOf('@',0);
    if (atPos == -1) {
       if (db) alert('Email address must contain an @');
       return false;
    }
    if (atPos == 0) {
       if (db) alert('Email address must not start with @');
       return false;
    }
    if (addr.indexOf('@', atPos + 1) > - 1) {
       if (db) alert('Email address must contain only one @');
       return false;
    }
    if (addr.indexOf('.', atPos) == -1) {
       if (db) alert('Email address must contain a period in the domain name');
       return false;
    }
    if (addr.indexOf('@.',0) != -1) {
       if (db) alert('Period must not immediately follow @ in email address');
       return false;
    }
    if (addr.indexOf('.@',0) != -1){
       if (db) alert('Period must not immediately precede @ in email address');
       return false;
    }
    if (addr.indexOf('..',0) != -1) {
       if (db) alert('Two periods must not be adjacent in email address');
       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 != 'arpa' && suffix != 'biz' && suffix != 'aero' && suffix != 'name' && suffix != 'coop' && suffix != 'info' && suffix != 'pro' && suffix != 'museum') {
       if (db) alert('Invalid primary domain in email address');
       return false;
    }
    return true;
}