/* 1.1.2: Fixed a bug where trailing . in e-mail address was passing
            (the bug is actually in the weak regexp engine of the browser; I
            simplified the regexps to make it work).
   1.1.1: Removed restriction that countries must be preceded by a domain,
            so abc@host.uk is now legal.  However, there's still the 
            restriction that an address must end in a two or three letter
            word.
     1.1: Rewrote most of the function to conform more closely to RFC 822.
     1.0: Original  */

function emailCheck (emailStr) {
/* The following pattern is used to check if the entered e-mail address
   fits the user@domain format.  It also is used to separate the username
   from the domain. */
var emailPat=/^(.+)@(.+)$/
/* The following string represents the pattern for matching all special
   characters.  We don't want to allow special characters in the address. 
   These characters include ( ) < > @ , ; : \ " . [ ]    */
var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
/* The following string represents the range of characters allowed in a 
   username or domainname.  It really states which chars aren't allowed. */
var validChars="\[^\\s" + specialChars + "\]"
/* The following pattern applies if the "user" is a quoted string (in
   which case, there are no rules about which characters are allowed
   and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
   is a legal e-mail address. */
var quotedUser="(\"[^\"]*\")"
/* The following pattern applies for domains that are IP addresses,
   rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
   e-mail address. NOTE: The square brackets are required. */
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
/* The following string represents an atom (basically a series of
   non-special characters.) */
var atom=validChars + '+'
/* The following string represents one word in the typical username.
   For example, in john.doe@somewhere.com, john and doe are words.
   Basically, a word is either an atom or quoted string. */
var word="(" + atom + "|" + quotedUser + ")"
// The following pattern describes the structure of the user
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
/* The following pattern describes the structure of a normal symbolic
   domain, as opposed to ipDomainPat, shown above. */
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")


/* Finally, let's start trying to figure out if the supplied address is
   valid. */

/* Begin with the coarse pattern to simply break up user@domain into
   different pieces that are easy to analyze. */
var matchArray=emailStr.match(emailPat)
if (matchArray==null) {
  /* Too many/few @'s or something; basically, this address doesn't
     even fit the general mould of a valid e-mail address. */
	alert("Email address seems incorrect (check @ and .'s)")
	return false
}
var user=matchArray[1]
var domain=matchArray[2]

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

/* if the e-mail address is at an IP address (as opposed to a symbolic
   host name) make sure the IP address is valid. */
var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
    // this is an IP address
	  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
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	alert("The domain name doesn't seem to be valid.")
    return false
}

/* domain name seems valid, but now make sure that it ends in a
   three-letter word (like com, edu, gov) or a two-letter word,
   representing country (uk, nl), and that there's a hostname preceding 
   the domain or country. */

/* Now we need to break up the domain to get a count of how many atoms
   it consists of. */
var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 || 
    domArr[domArr.length-1].length>3) {
   // the address must end in a two letter or three letter word.
   alert("The address must end in a three-letter domain, or two letter country.")
   return false
}

// Make sure there's a host name preceding the domain.
if (len<2) {
   var errStr="This address is missing a hostname!"
   alert(errStr)
   return false
}

// If we've gotten this far, everything's valid!
return true;
}

function Brochure_Validator(theForm)
{

  var i = 0;
  var j = 0;

  if ((theForm.Title[0].checked == 0) && (theForm.Title[1].checked == 0))
  {
    alert("Please choose a title.");
    theForm.Title[0].focus();
    return (false);
  }


  if (theForm.FirstName.value == "")
  {
    alert("Please enter a value for the \"first name\" field.");
    theForm.FirstName.focus();
    return (false);
  }

  var checkOK = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-' ";
  var checkStr = theForm.FirstName.value;
  var allValid = true;
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
  }
  if (!allValid)
  {
    alert("The \"first name\" field contains an invalid character.");
    theForm.FirstName.focus();
    return (false);
  }

  if (theForm.LastName.value == "")
  {
    alert("Please enter a value for the \"last name\" field.");
    theForm.LastName.focus();
    return (false);
  }
  var checkOK = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-' ";
  var checkStr = theForm.LastName.value;
  var allValid = true;
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
  }
  if (!allValid)
  {
    alert("The \"last name\" field contains an invalid character.\n\n('" + checkStr.charAt(i) + "' is not allowed in an name).");
    theForm.LastName.focus();
    return (false);
  }

  if (theForm.Address.value == "")
  {
    alert("Please enter a value for the \"address\" field.");
    theForm.Address.focus();
    return (false);
  }

  var checkOK = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-'./ ";
  var checkStr = theForm.Address.value;
  var allValid = true;
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
  }
  if (!allValid)
  {
    alert("The \"address\" field contains an invalid character.\n\n('" + checkStr.charAt(i) + "' is not allowed in an address).");
    theForm.Address.focus();
    return (false);
  }

/*
  var checkOK = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-'./ ";
  var checkStr = theForm.Address2.value;
  var allValid = true;
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
  }
  if (!allValid)
  {
    alert("The \"address\" field contains an invalid character.");
    theForm.Address2.focus();
    return (false);
  }
*/

  if (theForm.City.value == "")
  {
    alert("Please enter a value for the \"city\" field.");
    theForm.City.focus();
    return (false);
  }

  var checkOK = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-'./ ";
  var checkStr = theForm.City.value;
  var allValid = true;
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
  }
  if (!allValid)
  {
    alert("The \"city\" field contains an invalid character.\n\n('" + checkStr.charAt(i) + "' is not allowed in an city).");
    theForm.City.focus();
    return (false);
  }

  if (((theForm.Country.value == "Canada") || (theForm.Country.value == "United States")) && (theForm.Province.value == ""))
  {
    alert("Please enter a value for the \"province/state\" field.");
    theForm.Province.focus();
    return (false);
  }

  var checkOK = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-'. ";
  var checkStr = theForm.Province.value;
  var allValid = true;
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
  }
  if (!allValid)
  {
    alert("The \"province/state\" field contains an invalid character.");
    theForm.Province.focus();
    return (false);
  }

  if ((theForm.PostalCode.value == "") && !((theForm.Country.value == "Qatar") || (theForm.Country.value == "Ireland")))
  {
    alert("Please enter a value for the \"postal code\" field.");
    theForm.PostalCode.focus();
    return (false);
  }
  
  if (theForm.Country.value.toUpperCase() == "CANADA") {
    if (!isValidCanadianPostalCode(theForm.PostalCode.value)) {
      var errorMessage = "You have entered an invalid Canadian postal code. Please make sure your postal code is in the form A1A 1A1.";
      var errorPosition = -1;
      errorPosition = theForm.PostalCode.value.indexOf("o");
      if (errorPosition > -1) {
        errorMessage = errorMessage + "\n\nThe postal code you entered was " + theForm.PostalCode.value + ". The letter o is not a valid character.";
	  }
      errorPosition = theForm.PostalCode.value.indexOf("d");
      if (errorPosition > -1) {
        errorMessage = errorMessage + "\n\nThe postal code you entered was " + theForm.PostalCode.value + ". The letter d is not a valid character.";
	  }
      errorPosition = theForm.PostalCode.value.indexOf("i");
      if (errorPosition > -1) {
        errorMessage = errorMessage + "\n\nThe postal code you entered was " + theForm.PostalCode.value + ". The letter i is not a valid character.";
	  }
      errorPosition = theForm.PostalCode.value.indexOf("q");
      if (errorPosition > -1) {
        errorMessage = errorMessage + "\n\nThe postal code you entered was " + theForm.PostalCode.value + ". The letter q is not a valid character.";
	  }
      errorPosition = theForm.PostalCode.value.indexOf("u");
      if (errorPosition > -1) {
        errorMessage = errorMessage + "\n\nThe postal code you entered was " + theForm.PostalCode.value + ". The letter u is not a valid character.";
	  }
	  alert(errorMessage);
	  theForm.PostalCode.focus();
	  return false;
    }
  }

  if (theForm.Country.value.toUpperCase() == "UNITED STATES") {
    if (!isValidAmericanZipCode(theForm.PostalCode.value)) {
	  alert("You have entered an invalid zip code. Please make sure your zip code is in the form 12345 or 12345-6789.");
	  theForm.PostalCode.focus();
	  return false;
    }
  }

  var checkOK = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890- ";
  var checkStr = theForm.PostalCode.value;
  var allValid = true;
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
  }
  if (!allValid)
  {
    alert("The \"postal code\" field contains an invalid character.");
    theForm.PostalCode.focus();
    return (false);
  }

//  if (theForm.Telephone.value == "")
//  {
//    alert("Please enter a value for the \"phone number\" field.\n\nE.g., (416) 555-1234");
//    theForm.Telephone.focus();
//    return (false);
//  }

  if (theForm.Telephone.value != "") {
    var checkOK = "()0123456789- ext";
    var checkStr = theForm.Telephone.value;
    var allValid = true;
    for (i = 0;  i < checkStr.length;  i++)
    {
      ch = checkStr.charAt(i);
      for (j = 0;  j < checkOK.length;  j++)
        if (ch == checkOK.charAt(j))
          break;
      if (j == checkOK.length)
      {
        allValid = false;
        break;
      }
    }
    if (!allValid)
    {
      alert("The \"phone number\" field contains an invalid character.\n\nE.g., (416) 555-1234");
      theForm.Telephone.focus();
      return (false);
    }
  }

//  if (theForm.Email.value == "")
//  {
//    alert("Please enter a value for the \"email address\" field.");
//    theForm.Email.focus();
//    return (false);
//  }

  if (theForm.Email.value != "") {
    if (!emailCheck(theForm.Email.value)) {
      theForm.Email.focus();
      return (false);
    }
  }

  if (theForm.Referrer.value == "")
  {
    alert("Please enter a value for the \"name of the publication...\" field.");
    theForm.Referrer.focus();
    return (false);
  }

  var checkOK = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_'., 1234567890";
  var checkStr = theForm.Referrer.value;
  var allValid = true;
  for (i = 0;  i < checkStr.length;  i++)
  {
    ch = checkStr.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
      if (ch == checkOK.charAt(j))
        break;
    if (j == checkOK.length)
    {
      allValid = false;
      break;
    }
  }
  if (!allValid)
  {
    alert("The \"name of the publication...\" field contains an invalid character.");
    theForm.Referrer.focus();
    return (false);
  }
  
  return (true);
}



function isValidCanadianPostalCode(code) {
  code = code.replace(/\s*/g,"");
  if (code.length == 6 && isPostalChar(code[0]) && isDigit(code[1]) && isPostalChar(code[2]) && isDigit(code[3]) && isPostalChar(code[4]) && isDigit(code[5]))
    return true;
  else
    return false;
}

function isPostalChar(c) {
  // accept letters except for D, I, O, Q, and U
  var validChars = "abcefghjklmnprstvwxyzABCEFGHJKLMNPRSTVWXYZ";
  result = false;
  for (i = 0; i < validChars.length; i++) {
    if (c == validChars[i]) {
      result = true;
      break;
	}
  }
  return result;
}

function isDigit(c) {
  // accept only 0-9
  var validChars = "0123456789";
  result = false;
  for (i = 0; i < validChars.length; i++) {
    if (c == validChars[i]) {
      result = true;
      break;
	}
  }
  return result;
}

function isValidAmericanZipCode(code) {
  if ((code.length == 5 && isDigit(code[0]) && isDigit(code[1]) && isDigit(code[2]) && isDigit(code[3]) && isDigit(code[4])) || (code.length == 10 && isDigit(code[0]) && isDigit(code[1]) && isDigit(code[2]) && isDigit(code[3]) && isDigit(code[4]) && code[5] == '-' && isDigit(code[6]) && isDigit(code[7]) && isDigit(code[8]) && isDigit(code[9])))
    return true;
  else
    return false;
}