// $Id: form.js,v 1.0 2000/10/19 13:47:00

function Trim (text) {
    ndx = 0;
    lgth = text.length;
    while ((ndx < lgth) && (text.charAt(ndx) == ' ')) ++ndx;
    while ((lgth > ndx) && (text.charAt(lgth - 1) == ' ')) --lgth;
   return text.substring (ndx, lgth);
}

function RemoveWhitespace(text)
{
   ind = 0;
   lgth = text.length;
   result = "";
   while (ind < lgth)
   {
      if (text.charAt(ind) != ' ')
         result += text.charAt(ind);
      ind++;
   }
   return result;
}

function IsNumber(ch)
{
   if ((ch < '0') || (ch > '9'))
      return false;
   return true;
}

function IsAlphabetic(ch)
{
    if ( ((ch < 'A') || (ch > 'Z'))
      && ((ch < 'a') || (ch > 'z')) )
      return false;
   return true;
}

function IsNumeric (num) {
   ndx = 0;
    lgth = num.length;
   
   while (ndx < lgth) {
        if ( !IsNumber(num.charAt(ndx)) )
         return false;
      ++ndx;
   }
   
   return true;
}

function IsAlphaNumeric(num)
{
   ndx = 0;
    lgth = num.length;
   
   while (ndx < lgth) {
        if ( !IsNumber(num.charAt(ndx)) 
         && !IsAlphabetic(num.charAt(ndx)) )
         return false;
      ++ndx;
   }
   
   return true;
}

function IsAmount (num) {
   ndx = 0;
   dec = 0;
    lgth = num.length;
   
   while (ndx < lgth) {
        if ((num.charAt(ndx) < '0') || (num.charAt(ndx) > '9')) {
         if ((num.charAt(ndx) == '.') && (dec == 0)) {
            dec++;
            ndx++;
            continue;
         }

         return false;
      }
      ++ndx;
   }
   
   return true;
}

function EditRequired (obj, msg) {
   obj.value = Trim(obj.value);
   if (obj.value.length == 0) {
      return FormError (obj, msg);
   }
   return true;
}

function FormatText (obj)  { obj.value = Trim (obj.value); }
function FormatUpper (obj) { obj.value = Trim (obj.value.toUpperCase()); }

function FormatNum (obj) {
   obj.value = Trim (obj.value);
   
   if (!IsNumeric (obj.value))
      return FormError (obj, "The value entered must be numeric");
      
   return true;
}

function FormatAmt (obj) {
   obj.value = Trim (obj.value);
   
   if (!IsAmount (obj.value))
      return FormError (obj, "The value entered must be an amount");
      
   return true;
}

function FormatPhone (obj) {
   obj.value = Trim (obj.value);
   if (obj.value.length > 0)
      return EditPhoneNum (obj);
      
   return true;      
}

// YYYY-MM-DD
function FormatDate(obj)
{
   obj.value = RemoveWhitespace (obj.value);
   if (obj.value.length != 10)
      return DateError (obj);
   year = obj.value.substring(0, 4);
   month = obj.value.substring(5, 7);
   day = obj.value.substring(8, 10);
   if (!IsNumeric(year)
      || !IsNumeric(month)
      || !IsNumeric(day)
      || obj.value.charAt(4) != '-'
      || obj.value.charAt(7) != '-')
      return DateError (obj);
   return true;
}

function DateError (obj) {
      return FormError (obj, '"' + obj.value + '" is not a valid date format.\n' +
                     'Please use the form    YYYY-MM-DD   only.\n');
}

// HH:MM
function FormatTime(obj)
{
   obj.value = RemoveWhitespace (obj.value);
   if (obj.value.length != 5)
      return TimeError (obj);
   hour = obj.value.substring(0, 2);
   minute = obj.value.substring(3, 5);
   if (!IsNumeric(hour)
      || !IsNumeric(minute)
      || obj.value.charAt(2) != ':')
      return TimeError (obj);
   return true;
}

function TimeError (obj) {
      return FormError (obj, '"' + obj.value + '" is not a valid time format.\n' +
                     'Please use the form    HH:MM   only.\n');
}

function FormatProv (prov,country)  { 
   canprov_codes = new Array ('BC', 'AB', 'MB', 'SK', 'ON', 'QC', 'NF', 'NB', 'NS', 'PE', 'YT', 'NT','NU');
   if (prov.options[prov.selectedIndex].value.charAt(0) == '-') 
      return FormError(prov, "Please select a province or state code");
   for (ndx = 0; ndx < canprov_codes.length; ndx++) {
      if (canprov_codes[ndx] == prov.options[prov.selectedIndex].value) {
         country.value = 'Canada';
         return true;
      }
   }  
   country.value = 'USA';
   if (prov.options[prov.selectedIndex].value .charAt(0) == 'x') {
      country.value='X';
      return true;
   }
   return true;
}

function FormatProvince (prov,country,provx) { 
   canprov_codes = new Array ('BC', 'AB', 'MB', 'SK', 'ON', 'QC', 'NF', 'NB', 'NS', 'PE', 'YT', 'NT','NU');
   if ((prov.options[prov.selectedIndex].value.charAt(0) == '-') &&(provx.value==''))
      return FormError(prov, "Please select a province or state code");
   for (ndx = 0; ndx < canprov_codes.length; ndx++) {
      if (canprov_codes[ndx] == prov.options[prov.selectedIndex].value) {
         country.value = 'Canada';
         provx.value='';
         return true;
      }
   }  
   country.value = 'USA';
   if (prov.options[prov.selectedIndex].value .charAt(0) == 'x') {
       country.value='';
       return true;
   }
   provx.value ='' ;
   return true ;
}

function FormatPostal (obj) {
   FormatUpper(obj);
   if ((obj.value.length == 6) && (obj.value.charAt(0) >= 'A') && (obj.value.charAt(0) <="Z"))
      obj.value = obj.value.substring(0, 3) + ' ' + obj.value.substring(3, 6);
}

function FormatPostalCanadian(prov, obj) {
   canprov_codes = new Array ('BC', 'AB', 'MB', 'SK', 'ON', 'QC', 'NF', 'NB', 'NS', 'PE', 'YT', 'NT','NU');
   flag = false;
   for (ndx = 0; ndx < canprov_codes.length; ndx++) {
      if (canprov_codes[ndx] == prov.options[prov.selectedIndex].value) {
         flag = true;
      }
   }  
   obj.value = RemoveWhitespace(obj.value);
   if (!IsAlphaNumeric(obj.value))
      return FormError (obj, "Postal / Zip Code should contain only alphanumeric characters .");
   FormatUpper(obj);

   if (flag) // Inside Canada
   {
      if (obj.value.length != 6)
         return FormError (obj, "Canadian Postal Code should contain exactly 6 characters.");

      if (!IsAlphabetic(obj.value.charAt(0))
         || !IsNumber(obj.value.charAt(1))
         || !IsAlphabetic(obj.value.charAt(2))
         || !IsNumber(obj.value.charAt(3))
         || !IsAlphabetic(obj.value.charAt(4))
         || !IsNumber(obj.value.charAt(5)) )
         return FormError (obj, "Invalid Canadian Postal Code input:\n proper format is ANA NAN, where N is a digid and A is alphabetic character.");

      obj.value = obj.value.substring(0, 3) + ' ' + obj.value.substring(3, 6);
   }
   return true;
}

function PhoneError (obj) {
   return FormError (obj, '"' + obj.value + '" is not a valid telephone number.\n' +
                     'North American numbers must include the area code.\n' +
                     'International numbers must must begin with "+1".');
}

function EditPhoneNum (obj) {
   ndx = 0;
   num = obj.value;
   
   if ((num.charAt(0) == '+') && (num.charAt(1) == '1')) {
      ndx = 2;
      while (ndx < obj.value.length) {
         if ( ((num.charAt(ndx) < '0') || (num.charAt(ndx) > '9')) &&
            (num.charAt(ndx) != ' ') && 
            (num.charAt(ndx) != '-') &&
            (num.charAt(ndx) != '.') )
            return PhoneError (obj);
         ++ndx;
      }
      
      return true;
   }     
      
   if ((num.charAt(0) == '(') && (num.charAt(4) == ')')) {
      area = num.substring(1, 4);
      num = Trim (num.substring(5));
   } else {
      area = num.substring (0, 3);
      if ((num.charAt(3) == '-') || (num.charAt(3) == '.'))
         num = Trim (num.substring(4));
      else
         num = Trim (num.substring(3));
   }
   
   xchg = num.substring (0,3);
   if ((num.charAt(3) == '-') || (num.charAt(3) == '.'))
      num = Trim (num.substring(4));
   else
      num = Trim (num.substring(3));
      
   if (num.length > 4) {
      if ((num.charAt(4) == '-') || (num.charAt(4) == '.'))
         ext = Trim (num.substring(5));
      else
         ext = Trim (num.substring (4));
         
      num = Trim (num.substring (0, 4));
   }
   else
      ext = '';
      
   for (ndx = 0; ndx < ext.length; ndx++) {
      if ((ext.charAt(ndx) >= '0') && (ext.charAt(ndx) <= '9'))
         break;
   }
   
   ext = Trim (ext.substring (ndx));
      
   if (ext.length > 0)
      ext = 'X' + ext;

   if ((area.length != 3) || !IsNumeric(area) ||
      (xchg.length != 3) || !IsNumeric(xchg) ||
      (num.length  != 4) || !IsNumeric(num) ||
      (area.charAt(0) == '0') || (area.charAt(0) == '1') ||
      (xchg.charAt(0) == '0') || (xchg.charAt(0) == '1')) {
      return PhoneError (obj);
   }
      
   obj.value = Trim ('(' + area + ') ' + xchg + '-' + num + ' ' + ext);
   return true;
}




function FormError (obj, message) 
{
   alert (obj.name + ': ' + message + ' ("' + obj.value + '")');
    obj.focus ();
   return false;
}

function ValidateEmail (obj, required) 
{
   if (!ValidateText(obj, required))
      return false;
   else if (ValidateText(obj, required) != -1)
      return true;
         
   ndx = 1;
   atsign = false;
   dot = false;
   
   var error = "not a valid E-mail address.";

   while (ndx < obj.value.length) 
   {
      if (obj.value.charAt(ndx) == ' ')
         return FormError(obj, error);
         
      if (obj.value.charAt(ndx) == '@') {
         atsign = true;
         ++ndx;
         break;
      }
      
      ++ndx;
   }

   if (!atsign) return FormError(obj, error);
   
   ++ndx;
   while (ndx < obj.value.length) {
      if (obj.value.charAt(ndx) == ' ')
         return FormError(obj, error);
         
      if (obj.value.charAt(ndx) == '.') {
         dot = true;
         ++ndx;
         break;
      }
      
      ++ndx;
   }  
   
   if (ndx >= obj.value.length) return FormError(obj, error);
   if (!dot) return FormError(obj, error);
   
   return true;
}

function ValidateCreditCard (obj, required) 
{
   if (!ValidateText(obj, required))
      return false;
   else if (ValidateText(obj, required) != -1)
      return true;

   if (!IsValidCC(obj.value))
   {
      return FormError(obj, "not a valid credit card number.");
   }

   return true;
}

function ValidatePhone (obj, required) 
{
   if (!ValidateText(obj, required))
      return false;
   else if (ValidateText(obj, required) != -1)
      return true;

   ndx = 0;
   num = obj.value;
   
   if ((num.charAt(0) == '+') && (num.charAt(1) == '1')) {
      ndx = 2;
      while (ndx < obj.value.length) {
         if ( ((num.charAt(ndx) < '0') || (num.charAt(ndx) > '9')) &&
            (num.charAt(ndx) != ' ') && 
            (num.charAt(ndx) != '-') &&
            (num.charAt(ndx) != '.') )
            return FormError(obj, 'not a valid telephone number.\n' +
                     'North American numbers must include the area code.\n' +
                     'International numbers must must begin with "+1".');
         ++ndx;
      }
      
      return true;
   }     
      
   if ((num.charAt(0) == '(') && (num.charAt(4) == ')')) {
      area = num.substring(1, 4);
      num = Trim (num.substring(5));
   } else {
      area = num.substring (0, 3);
      if ((num.charAt(3) == '-') || (num.charAt(3) == '.'))
         num = Trim (num.substring(4));
      else
         num = Trim (num.substring(3));
   }
   
   xchg = num.substring (0,3);
   if ((num.charAt(3) == '-') || (num.charAt(3) == '.'))
      num = Trim (num.substring(4));
   else
      num = Trim (num.substring(3));
      
   if (num.length > 4) {
      if ((num.charAt(4) == '-') || (num.charAt(4) == '.'))
         ext = Trim (num.substring(5));
      else
         ext = Trim (num.substring (4));
         
      num = Trim (num.substring (0, 4));
   }
   else
      ext = '';
      
   for (ndx = 0; ndx < ext.length; ndx++) {
      if ((ext.charAt(ndx) >= '0') && (ext.charAt(ndx) <= '9'))
         break;
   }
   
   ext = Trim (ext.substring (ndx));
      
   if (ext.length > 0)
      ext = 'X' + ext;

   if ((area.length != 3) || !IsNumeric(area) ||
      (xchg.length != 3) || !IsNumeric(xchg) ||
      (num.length  != 4) || !IsNumeric(num) ||
      (area.charAt(0) == '0') || (area.charAt(0) == '1') ||
      (xchg.charAt(0) == '0') || (xchg.charAt(0) == '1')) {
      return FormError(obj, 'not a valid telephone number.\n' +
         'North American numbers must include the area code.\n' +
         'International numbers must must begin with "+1".');
   }
      
   obj.value = Trim ('(' + area + ') ' + xchg + '-' + num + ' ' + ext);
   return true;
}

function ValidateInteger (obj, required) 
{
   if (!ValidateText(obj, required))
      return false;
   else if (ValidateText(obj, required) != -1)
      return true;

   num = obj.value;

   ndx = 0;
    lgth = num.length;
   
   while (ndx < lgth) 
   {
        if ( !IsNumber(num.charAt(ndx)) )
         return FormError(obj, 'integer value expected.');
      ++ndx;
   }
   
   return true;
}

function ValidateText (obj, required) 
{
   obj.value = Trim (obj.value);


   if (obj.value.length == 0)
   {
      if (!required)
         return true;
      else
         return FormError(obj, "required field should not be left blank.");
   }
   else
      return -1;
}






function FormatPassword (password, confirm_password) {
// if (trim(password.value) != trim(confirm_password.value)) {
   if (password.value != confirm_password.value) {
      return FormError(password, "The password and verification password do not match.");
   }
   return true ;
}

function FormatSalutation(salutation) {
   if (salutation.options[salutation.selectedIndex].value.charAt(0) == '-') 
      return FormError(salutation, "Please let us know how to address you.");
   return true ;
}

function FormatCCType(cctype) {
   if (cctype.selectedIndex == 0) 
      return FormError(cctype, "Please select a Credit Card Type.");
   return true ;
}

function EditAddress2 (addr1, addr2)   { 
   addr1.value = Trim (addr1.value);
   addr2.value = Trim (addr2.value);
   
   if (addr1.value == "") {
      addr1.value = addr2.value;
      addr2.value = "";
   }
   
   return EditRequired (addr1, "Please enter your company address.");
}

function EditCountry (obj) { 
   if (!EditRequired (obj, "Please enter your country."))
      return false;
      
   return true;   
}


function EditPhone (obj) {
   if (!EditRequired (obj, "Please enter your telephone number."))   
      return false;
      
   return EditPhoneNum (obj);
}

function EditEmail (obj) {
   if (!EditRequired (obj, "Please enter a valid email address- it is required to send you a registration code."))
      return false;
   return true;
}

function EditFirstName (obj)  { return EditRequired (obj, "Please enter your first name."); }

function EditLastName (obj)   { return EditRequired (obj, "Please enter your last name."); }

function EditOrganizationName (obj)    { return EditRequired (obj, "Please enter the name of your organization."); }

function EditEventTitle(obj) { return  EditRequired (obj, "Please enter the title of event."); }

function EditEventLocation(obj) { return  EditRequired (obj, "Please enter the location of event (or its street address, if any)"); }

function EditEventDescription(obj) { return  EditRequired (obj, "Please enter the description of event"); }

function EditNumParticipants(obj) 
{ 
   if (!EditRequired (obj, "Please enter the number of participants"))
      return false;
   return  FormatNum (obj); 
}

function EditDate(obj) 
{ 
   if (!EditRequired (obj, "Please enter the date"))
      return false;
   return  FormatDate (obj); 
}

function EditTime(obj) 
{ 
   if (!EditRequired (obj, "Please enter the time"))
      return false;
   return  FormatTime (obj); 
}

function EditCCName (obj)  { return EditRequired (obj, "Please enter the Credit Card holder's name."); }

function EditHintQ (obj)   { return EditRequired (obj, "Please enter a question for us to help you with in case you forget your password."); }

function EditHintA (obj)   { return EditRequired (obj, "Please enter an answer for your question."); }

function EditCompany (obj)    { return EditRequired (obj, "Please enter your company name."); }

function EditAddress (obj)  { return EditRequired (obj, "Your must enter your address."); }

function EditCity (obj)    { return EditRequired (obj, "Please enter your city."); }

function EditProv (prov,provx)   { 
    tmp = Trim (prov.value) + Trim (provx.value);
    if ((tmp =="") ||(tmp =="-")||(tmp =="x")) 
   return FormError(prov,"Please enter your state/province.") ;
    else
   return true ;
      
}

function EditPassword (obj) { return EditRequired (obj, "Please set a password for yourself.");}

function EditLoginPassword (obj) { return EditRequired (obj, "Please enter your password.");}

function EditPostal (obj)  { return EditRequired (obj, "Please enter your postal or zip code.");}

function EditPostalCanadian (prov, obj)   
{
   if (!EditRequired (obj, "Please enter the postal code"))
      return false;
   return  FormatPostalCanadian (prov, obj); 
}

function EditComment (obj)    { return EditRequired (obj, "Please enter your query or comment."); }

function EditPassword2 (password1,password2) { 
   if (!EditRequired(password2)) {
      return EditRequired (password2, "Please confirm your password.");
   }else{
      if (password1 != password2) {

         return FormError(password1,"The two passwords you provide must be exactly the same.") ;
      }
   return true ;
   }
}
   
function EditCCNum (obj) {
   if (!EditRequired (obj, "Please enter the a valid Credit Card Number."))
      return false;
   if (!IsValidCC(obj.value))
      return FormError (obj, obj.value + " is not a valid Credit Card Number.");
   return true;
}

function FormatCCNum (obj) {
   if (!IsValidCC(obj.value))
      return FormError (obj, obj.value + " is not a valid Credit Card Number.");
   return true;
}

function EditValidationCCNum (obj) {
   if (!EditRequired (obj, "Please enter the last block of 3 or 4 digits on the signature strip on the back of your Credit Card."))
      return false;
   if (!IsNumeric(obj.value))
      return FormError(obj,obj.value+" is not a proper validation code.") ;
   if ((obj.value.length < 3)||(obj.value.length > 4))
      return FormError(obj, " The validation code is the last block of 3 or 4 digits on the signature strip on the back of your Credit Card.") ;
   return true;
}

function EditSelected (obj, msg) {
   if (obj.selectedIndex > 0 && obj.options[obj.selectedIndex].value.charAt(0) != '-') return true;
   
   return FormError (obj, msg);
}

function EditRadio (obj, msg) {
    for (ndx = 0; ndx < obj.length; ndx++) {
        if (obj[ndx].checked)
         return true;
   }
   
   return FormError (obj[0], msg);
}

function FormatProvx(prov,country) {
    prov.value='x' ;   
    country.value='';
}

function checkSelect( field, msg )
{
   // To make it easier, just check to see if the index is 0
   if( field.selectedIndex == 0 )
   {
      alert( msg + " is a required field." );
      field.focus();
      return false;
   }
   return true;
}

function checkField( field, msg )
{
   if( field.value == "" )
   {
      alert( msg + " is a required field." );
      field.focus();
      return false;
   }
   return true;
}

function isInteger (num) 
{
   //alert("num=" + num);
    ndx = 0;
    lgth = num.length;
    valid = true;
   
   while (ndx < lgth) 
   {
        if ( !IsNumber(num.charAt(ndx)) )
         valid = false;
      ++ndx;
   }
   
   return valid;
}

function isInteger2 (numObj,titleStr) 
{
   
    ndx = 0;
    numStr = numObj.value; //alert("num=" + numStr);
    lgth = numStr.length;
    valid = true;
   
   while (ndx < lgth) 
   {
   if ( !IsNumber(numStr.charAt(ndx)) )
         valid = false;
      ++ndx;
   }

   if( !valid )
      {
         alert( titleStr + " must be an integer." );
         numObj.focus();
         return false;
      }
   return true;
}

function validEmail( Email )
{   
   var reEmail = /^([0-9A-Za-z\._-]+[']*)+\@[0-9A-Za-z\._-]+\.[A-Za-z]+$/;
   return reEmail.test( Email );
}