function doValidateEmail( form ){
  if (!emailCheck(form.em.value)) return false;
  return true;
}

function doUpdateProfile( form ){

  var validChars="\[^\\s" + "" + "\]";

  // Password
  if (form.pd.value==null){
    alert('Invalid Password!');
    return false;
  } 
  if (form.pd.value==''){
    alert('Invalid Password!');
    return false;
  } 
  
  if (form.pd.value.length<6){
    alert('Invalid Password - Passwords must be at least 6 chars long!');
    return false;
  }

  for (i=0; i<form.pd.value.length; i++) {
      if (form.pd.value.charCodeAt(i)>127) {
          alert("Password contains invalid characters.");
          return false;
      }
  } 


  if (form.pd2.value==null){
    alert('Invalid Password!');
    return false;
  } 
  if (form.pd2.value==''){
    alert('Invalid Password!');
    return false;
  } 
  
  if (form.pd2.value.length<6){
    alert('Invalid Password - Passwords must be at least 6 chars long!');
    return false;
  }

  if (form.pd.value!=form.pd2.value){
    alert('Passwords are different! Re-type password and verification password');
    return false;
  }

  return true;  
}

function doRegister( form ){
  // Login
  if (!isValid(form.nm.value)){
    alert('Invalid Login Name!');
    return false;
  }

  if (form.nm.value.length<6){
    alert('Invalid Login name - Login Name must be at least 6 chars long!');
    return false;
  }

  var validChars="\[^\\s" + "" + "\]";
  for (i=0; i<form.nm.value.length; i++) {
      if (form.nm.value.charCodeAt(i)>127) {
          alert("Login Name contains invalid characters.");
          return false;
      }
  } 
  
  // Email
  if (!emailCheck(form.em.value)) return false;
  if (form.em.value!=form.vem.value){
    alert('Email address are different! Re-type email and verification email');
    return false;
  }
  // Password
  if (form.pd.value==null){
    alert('Invalid Password!');
    return false;
  } 
  if (form.pd.value==''){
    alert('Invalid Password!');
    return false;
  } 
  
  if (form.pd.value.length<6){
    alert('Invalid Password - Passwords must be at least 6 chars long!');
    return false;
  }

  for (i=0; i<form.pd.value.length; i++) {
      if (form.pd.value.charCodeAt(i)>127) {
          alert("Password contains invalid characters.");
          return false;
      }
  } 


  if (form.pd2.value==null){
    alert('Invalid Password!');
    return false;
  } 
  if (form.pd2.value==''){
    alert('Invalid Password!');
    return false;
  } 
  
  if (form.pd2.value.length<6){
    alert('Invalid Password - Passwords must be at least 6 chars long!');
    return false;
  }

  if (form.pd.value!=form.pd2.value){
    alert('Passwords are different! Re-type password and verification password');
    return false;
  }
  
  // Privacy
  if (!form.term.checked){
    alert('You must agree to the term of the service to register.');
    return false;
  }

  return true;  
}

function emailCheck (emailStr) {
    var checkTLD=0;
    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 +")*$");
    var matchArray=emailStr.match(emailPat);
    if (matchArray==null) {
        alert("Invalid mail address");
        return false;
    }
    var user=matchArray[1];
    var domain=matchArray[2];
    for (i=0; i<user.length; i++) {
        if (user.charCodeAt(i)>127) {
            alert("Ths username contains invalid characters.");
            return false;
        }
    }
    for (i=0; i<domain.length; i++) {
        if (domain.charCodeAt(i)>127) {
            alert("Ths domain name contains invalid characters.");
            return false;
        }
    }
    if (user.match(userPat)==null) {
        alert("The username doesn't seem to be valid.");
        return false;
    }
    var IPArray=domain.match(ipDomainPat);
    if (IPArray!=null) {
        for (var i=1;i<=4;i++) {
            if (IPArray[i]>255) {
                alert("Destination IP address is invalid!");
                return false;
            }
        }
        return true;
    }
    var atomPat=new RegExp("^" + atom + "$");
    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;
}

function isValid(value){
  if (value==null) return false;
  if (value=='') return false;
  return true;  
}