<!--

/**************************
** Validation functions ***
***************************

function CheckAbsoluteLinkField(field,langcode)
function CheckDateField(yearfield,monthfield,dayfield,langcode)
function CheckExclusiveMandatoryFields(field1,field1name,field2,field2name,langcode)
function CheckForSpaces(field,fieldname,langcode)
function CheckLinkField(field,langcode)

function CheckDateField(yearfield,monthfield,dayfield,langcode)
function CheckEquals(field1,field2,message)
function CheckMandatorycheckbox(field,fieldname,langcode)
function CheckMandatoryField(field,fieldname,langcode)
function CheckMandatoryListBox(field,fieldname,langcode)
function CheckMandatoryRadio(field,fieldname,langcode)
function CheckMandatorySelect(field,fieldname,langcode)

function CheckNumberField(field,max,min,langcode)
function CheckNumberField2(field,min,langcode)
function CheckNumberField3(field,max,langcode)
function CheckNumberField4(field,fieldname,langcode)
function CheckRadioForInput(CheckField)
function CheckRelativeLinkField(field,langcode)
function CheckStringField(field,max,langcode)
function CheckStringField2(field,fieldname,iMaxlength,iMinlength,langcode)

function ClearAllOptionsAndCheckboxes(objCheckbox)

function schrikkelyear(year)
function TrimSpaces(sstring)
function TrimZeroes(numstring)

**************************/
function trim(value) {
  value = value.replace(/^\s+/,'');
  value = value.replace(/\s+$/,'');
  return value;
}

function TrimSpaces(sstring)
{
  while(sstring.charAt(0) == " ") sstring = sstring.substring(1);
  return sstring;
}

function TrimZeroes(numstring)
{
  while(numstring.charAt(0) == "0") numstring = numstring.substring(1);
  if(numstring == "") numstring = "0";
  return numstring;
}

function schrikkelyear(year)
{
  if((year % 4) == 0)
  {
    if((year % 100) == 0)
    {
      result = ((year % 400) == 0);
    }
    else
    {
      result = true;
    }
  }
  else
  {
    result = false;
  }
  return result;
}

function CheckMandatoryListBox(field, fieldname, langcode)
{
  checked = false;
  for(i = 0 ;i < field.length ; i++)
  {
    if(!field[i].value == '')
    {
      checked |= field[i].selected;
    }
  }
  if(!checked)
  {
    if(langcode == "FR")
    {
      alert("Pour continuer, veuillez faire votre choix dans la liste \'" + fieldname + "\'.");
    }
    else if(langcode == "NL")
    {
      alert("Gelieve in de lijst \'" + fieldname + "\' een keuze te maken om verder te gaan.");
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(fieldname + " is mandatory !");
    }               
    return false;         
  }
  else 
  {
    return true;
  }
}

function CheckLinkField(field,langcode)
{    
  if (field.value != "" & !( field.value.charAt(0) == "/" || field.value.substring(0,7) == "http://") )  

  {
    if(langcode == "FR")
    {
      alert(field.value + " n\'est pas un link valid !");
    }
    else if(langcode == "NL")
    { 
      alert(field.value + " is geen geldige link");
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(field.value + " is not a valid link !");
    }
    return false;
  }
  else 
  {
    return true;
  }
}

function CheckRelativeLinkField(field,langcode)
{    
  if (field.value != "" & !( field.value.charAt(0) == "/") )  

  {
    if(langcode == "FR")
    {
      alert(field.value + " n\'est pas un link relative !");
    }
    else if(langcode == "NL")
    {
      alert(field.value + " is geen relatieve link");
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(field.value + " is not a relative link !");
    }
    return false;
  }
  else 
  {
    return true;
  }
}

function CheckAbsoluteLinkField(field,langcode)
{    
  if(field.value != "" & field.value.substring(0,7) != "http://")  
  {
    if(langcode == "FR")
    {
      alert(field.value + " n\'est pas un link relatif !");
    }
    else if(langcode == "NL")
    {
      alert(field.value + " is geen relatieve link");
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(field.value + " is not a relative link !");
    }
    return false;
  }
  else 
  {
    return true;
  }
}

function CheckNumberField(field, fieldname, max, min, langcode)
{    

  sNo = TrimZeroes(field.value);
  lNo = parseInt(sNo);
  sNewNo = lNo + "";
 
  if(field.value != "" && (sNewNo != sNo || lNo > max || lNo < min))
  {
  
    if(langcode == "FR")
    {
      alert(field.value + " n\'est pas un numero ou est trop grand ou trop petit !");
    }
    else if(langcode == "NL")
    {
      alert(field.value + " is geen nummer of is te groot of te klein !");
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(field.value + " is not a number or is too big  or too small!");
    }
    field.value="";
    return false;
  }
  else 
  {
    return true;
  }
}

function CheckNumberField2(field, min,langcode)
{    
  sNo = TrimZeroes(field.value);
  lNo = parseInt(sNo);
  sNewNo = lNo + "";
  if(field.value != "" && (sNewNo != sNo || lNo < min))
  {
    if(langcode == "FR")
    {
      alert(field.value + " n\'est pas une numéro ou est trop petite!");
    }
    else if(langcode == "NL")
    {
      alert(field.value + " is geen nummer of is te klein!");
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(field.value + " is not a number or is too small!");
    }          
    field.value="";
    return false;
  }
  else 
  {
    return true;
  }
}

function CheckNumberField3(field,  max,langcode)
{    
  sNo = TrimZeroes(field.value);
  lNo = parseInt(sNo);
  sNewNo = lNo + "";
  if(field.value != "" && (sNewNo != sNo || lNo >= max))
  {
    if(langcode == "FR")
    {
      alert(field.value + " n\'est pas une numéro ou est trop grand!");
    }
    else if(langcode == "NL")
    {
      alert(field.value + " is geen nummer of is te groot!");
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(field.value + " is not a number or is too large!");
    }          
    field.value="";
    return false;
  }
  else 
  {
    return true;
  }
}


function CheckNumberField4(field,fieldname,langcode)
{    
  sNo = TrimZeroes(field.value);
  lNo = parseInt(sNo);
  sNewNo = lNo + "";
  if(field.value != "" && (sNewNo != sNo))
  {
    if(langcode == "FR")
    {
      alert(fieldname + ": " + field.value + " n\'est pas une numéro!");
    }
    else if(langcode == "NL")
    {
      alert(fieldname + ": " + field.value + " is geen nummer !");
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(fieldname + ": " + field.value + " is not a number!");
    }          
    field.value="";
    return false;
  }
  else 
  {
    return true;
  }
}

function CheckStringField(field,max,langcode)
{
  if(field.value.length > max)
  {
    if(langcode == "FR")
    {
      alert(field.value + " contient trop de characters! (maximum " + max + ")");
    }
    else if(langcode == "NL")
    {
      alert(field.value + " bevat teveel tekens ! (maximaal " + max + ")");
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(field.value + " contains too many characters ! (maximum " + max + ")");
    }
    field.value="";
    return false;
  }
  else 
  {
    return true;
  }
}

function CheckStringField2(field,fieldname,iMaxlength,iMinlength,langcode)
{
  if(field.value.length > iMaxlength || field.value.length < iMinlength)
  {
    if(langcode == "FR")
    {
      alert("La case \'" + fieldname + "\' contient trop de characters! (minimum " + iMinlength + " - maximum " + iMaxlength + ")");
    }
    else if(langcode == "NL")
    {
      alert("Het veld \'" + fieldname + "\' moet een lengte hebben van minimum " + iMinlength + " en maximum " + iMaxlength + " karakters");
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(field.value + " contains too many characters ! (minimum " + iMinlength + " - maximum " + iMaxlength + ")");
    }
    field.value="";
    return false;
  }
  else 
  {
    return true;
  }
}  

function CheckDateField(yearfield, monthfield, dayfield, langcode)
{
  datefield = dayfield.value + "/" + monthfield.value + "/" + yearfield.value;
  if((yearfield.value == "") || (monthfield.value == "") || (dayfield.value == ""))
  {
    if((yearfield.value) || (monthfield.value) || (dayfield.value))
    {
      if(langcode == "FR")
      {
        alert("\'" + datefield + "\' n\'est pas une date authorisée");
      }
      else if(langcode == "NL")
      {
        alert("\'" + datefield + "\' is geen geldige datum. Gelieve een geldige datum in te vullen om verder te gaan.");
      }
      else if(langcode == "EN" || langcode == "ES")
      {
        alert(datefield + " is not a valid date");
      }            
      yearfield.value = "";
      monthfield.value = "";
      dayfield.value = "";
      return false
    }
    else
    {
      return true;
    }
    //alert("er is een veld leeg")
    return false;
  }
  else
  {
    if(!(CheckNumberField(yearfield,'',   2070, 1900, langcode))) return false;
    if(!(CheckNumberField(monthfield,'',    12, 1, langcode))) return false;
    if(!(CheckNumberField(dayfield,'',      31, 1, langcode))) return false;

    monthval = parseInt(TrimZeroes(monthfield.value));
    dayval = parseInt(TrimZeroes(dayfield.value));
    yearval = parseInt(TrimZeroes(yearfield.value));

    if((monthval == 4) || (monthval == 6) || (monthval == 9) || (monthval == 11))
    {
      maxday = 30;
    }
    else if(monthval == 2)
    {
      if(schrikkelyear(yearval)) maxday = 29;
      else                       maxday = 28;
    }
    else
    {
      maxday = 31;
    }

    if(dayval > maxday)
    {
      if(langcode == "FR")
      {
        alert("\'" + datefield + "\' n\'est pas une date authorisée.");
      }
      else if(langcode == "NL")
      {
        alert("\'" + datefield + "\' is geen geldige datum. Gelieve een geldige datum in te vullen om verder te gaan.");
      }
      else if(langcode == "EN" || langcode == "ES")
      {
        alert(datefield + " is not a valid date");
      }                        
      yearfield.value = "";
      monthfield.value = "";
      dayfield.value = "";
      return false
    }
    else
    {
      return true;
    }
  }
}

function CheckMandatoryField(field, fieldname, langcode)
{
  if(field.value == "")
  {
    if(langcode == "FR")
    {
      alert("Le champ \'" + fieldname + "\' doit être complété pour que vous puissiez continuer.");
    }
    else if(langcode == "NL")
    {
      alert("Gelieve het veld \'" + fieldname + "\' in te vullen om verder te gaan.");
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(fieldname + " is mandatory !");
    }         
    return false;
  }
  else 
  {
    return true;
  }
}

function CheckForSpaces(field, fieldname, langcode)
{
  if(TrimSpaces(field.value) == "")
  {
    if(langcode == "FR")
    {
      alert("Le champ \'" + fieldname + "\' est vide.");
    }
    else if(langcode == "NL")
    {
      alert("Het veld \'" + fieldname + "\' is leeg.");
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(fieldname + " is empty !");
    }         
     return false;
  }
  else 
  {
   return true;
  }
}  

function CheckExclusiveMandatoryFields(field1, field1name, field2, field2name, langcode)
{
  if((field1.value == "") && (field2.value == ""))
  {
    if(langcode == "FR")
    {
      alert("Le champ \'" + field1name + "\' ou le champ \'" + field2name + "\' doit être complété pour que vous puissiez continuer.");
    }
    else if(langcode == "NL")
    {
      alert("Gelieve het veld \'" + field1name + "\' of het veld \'" + field2name + "\' in te vullen om verder te gaan.");
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(field1name + " or " + field2name + " is mandatory !");
    }          
    return false;
  }
  else 
  {
    return true;
  }
}

function CheckMandatoryRadio(field, fieldname,langcode)
{
  checked = false;
  if (field.length > 1)
  {
    for(i = 0 ;i < field.length ; i++)
    {
    checked |= field[i].checked;
    }
  }
  else
  {
    if(field.checked)
    {
      checked = true ;
    }        
  }
  if(!checked)
  {

    if(langcode == "FR")
    {
      alert(fieldname + " doit être complété pour que vous puissiez continuer. !");
    }
    else if(langcode == "NL")
    {
      alert("De keuze \'" + fieldname + "\' is verplicht!");
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(fieldname + " is mandatory !");
    }   

    return false;
  }
  else 
  {
    return true;
  }
}

function CheckMandatoryRadioSpecial(field, fieldname,langcode)
{
  checked = false;
  if (field.length > 1)
  {
    for(i = 0 ;i < field.length ; i++)
    {
    checked |= field[i].checked;
    }
  }
  else
  {
    if(field.checked)
    {
      checked = true ;
    }        
  }
  if(!checked)
  {

    if(langcode == "FR")
    {
      alert(fieldname );
    }
    else if(langcode == "NL")
    {
      alert(fieldname);
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(fieldname + " is mandatory !");
    }   

    return false;
  }
  else 
  {
    return true;
  }
}

function CheckMandatorySelect(field, fieldname,langcode)
{
  checked = false;
  if (field.length > 1)
  {
    for(i = 0 ;i < field.length ; i++)
    {
      if(!field[i].value == '')
      {
        checked |= field[i].selected;
      }
    }
  } 
  else
  {
    if(field.selected )
    {
      checked = true;
    }
  }
  if(!checked)
  {
    if(langcode == "FR")
    {
      alert("Pour continuer, veuillez faire votre choix dans la liste \'" + fieldname + "\'.");
    }
    else if(langcode == "NL")
    {
      alert("Gelieve in de lijst \'" + fieldname + "\' een keuze te maken om verder te gaan.");
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(fieldname + " is mandatory !");
    }   
    return false;
  }
  else 
  {
    return true;
  }
}

function CheckEquals(field1,field2, message)
{
  if(TrimSpaces(field1.value) == TrimSpaces(field2.value))
  {
     return true;
  }
  else 
  {
     alert( message );
     return false;
  }
}

function CheckEmail (field, fieldname, langcode) 
{
  emailStr = field.value;

  /* 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 represents the range of characters allowed as
   the first character in a valid username or domain.  I just made it
   the same as above, but if you want to add a different constraint,
   you would change it here. */
  var firstChars=validChars

  /* 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 at atom (basically a series of
   non-special characters.) */
  var atom="(" + firstChars + 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 course 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. */
    if (langcode == "FR")
    {
     alert("L\'adresse e-mail que vous avez indiquée n\'est pas correcte. Une adresse e-mail valable contient\nle signe \'@\', au moins une \'.\' et un nom de domaine valable \(ex. \'info@i-merge.net\'\).")
    }
    else if (langcode == "NL")
    {
      alert("Het e-mailadres dat je hebt opgegeven is niet correct. Een geldig e-mailadres bevat\neen \'@\', minstens één \'.\' en een geldige domeinnaam \(bv. \'info@i-merge.net\'\).")
    }
    else if (langcode == "EN" || langcode == "ES")
    {
      alert(fieldname + ": 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
    if (langcode == "FR")
    {
      alert(fieldname + ": username doesn\'t seem to be valid.")
    }
    else if (langcode == "NL")
    {
      alert("De \'username\' in het " + fieldname + " is niet correct.")
    }
    else if (langcode == "EN" || langcode == "ES")
    {
      alert(fieldname + ": 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) 
      {
        if (langcode == "FR")
        {
          alert(fieldname + ": destination IP address is invalid!")
        }
        else if (langcode == "EN" || langcode == "ES")
        {
          alert(fieldname + ": destination IP address is invalid!")
        }
        else if (langcode == "NL")
        {
          alert(fieldname + ": het IP adres is ongeldig!")
        }        

        return false
      }
    }
    return true
  }

  // Domain is symbolic name
  var domainArray=domain.match(domainPat)
  if (domainArray==null) 
  {
    if (langcode == "FR")
    {
      alert("L\'adresse e-mail que vous avez indiquée n\'est pas correcte. Une adresse e-mail valable contient\nle signe \'@\', au moins une \'.\' et un nom de domaine valable \(ex. \'info@i-merge.net\'\).")
    }
    else if (langcode == "EN" || langcode == "ES")
    {
      alert(fieldname + ": domain name doesn\'t seem to be valid.")
    }
    else if (langcode == "NL")
    {
      alert("Het e-mailadres dat je hebt opgegeven is niet correct. Een geldig e-mailadres bevat\neen \'@\', minstens één \'.\' en een geldige domeinnaam \(bv. \'info@i-merge.net\'\).")
    }        

    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).
   If there's a country code at the end of the address, the full domain
   must include a hostname and category (e.g. host.co.uk or host.pub.nl).
   If it ends in a .com or something, make sure there's a hostname.*/

  /* 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>4) 
  {
   // the address must end in a two letter or three letter word.
    if (langcode == "FR")
    {
      alert(fieldname + ": address must end in a three(four)-letter domain, or two letter country.")
    }
    else if (langcode == "EN" || langcode == "ES")
    {
      alert(fieldname + ": address must end in a three(four)-letter domain, or two letter country.")
    }
    else if (langcode == "NL")
    {
      alert("Het domein van het " + fieldname + " moet uit 2,3 of 4 letters bestaan.")
    }        

   return false
  }


  /* If it just ends in .com, .gov, etc., make sure there's a host name.
   This case can never actually happen because earlier checks take
   care of this implicitly, but we'll do it anyway. */
  if (domArr[domArr.length-1].length==3 && len<2) 
  {
    var errStr="This address is missing a hostname!"
    if (langcode == "FR")
    {
      alert(fieldname + ": This address is missing a hostname!")
    }
    else if (langcode == "EN" || langcode == "ES")
    {
      alert(fieldname + ": This address is missing a hostname!")
    }
    else if (langcode == "NL")
    {
       alert(fieldname + ": dit adres heeft geen \'hostname\'!")
    }        

   return false
  }
  // If we've gotten this far, everything's valid!
  return true;
}

function ClearAllOptionsAndCheckboxes(objCheckbox)
{
  var imax1 = objCheckbox.length;
  for (var idx = 0; idx < imax1; idx++) 
  {
    if (eval("objCheckbox[" + idx + "].checked") == true) 
    {
      objCheckbox[idx].checked = false;
    }
  }
} 

function CheckRadioForInput(CheckField)
{
  var imax = CheckField.length - 1;
  if (!(CheckField[imax].checked)) 
  {
    return false;
  }
  return true;
}

function CheckMandatorycheckbox(field, fieldname, langcode)
{
  checked = false;

  if (field.length > 1)
  {
    for(i = 0 ;i < field.length ; i++)
    {
      if(field[i].checked )
      {
        checked = true ;
      }
    }
  }
  else
  {
    if(field.checked )
    {
      checked = true ;
    }
  }
  if(checked == false )
  {
    if(langcode == "FR")
    {
      alert("Pour continuer, veuillez faire votre choix dans la liste \'" + fieldname + "\'.");
    }
    else if(langcode == "NL")
    {
      alert("Gelieve \'" + fieldname + "\' aan te vinken om door te gaan.");
    }
    else if(langcode == "EN" || langcode == "ES")
    {
      alert(fieldname + " is mandatory !");
    }
    else if(langcode == "CUSTOM")
    {
      alert(fieldname);
    }    
    return false;
  }
  else 
  {
    return true;
  }
}

//-->