    <!--
      /**************************
       ** Validation functions **
       **************************/
      function TrimSpaces(sstring)
      {
        while(sstring.charAt(0) == " ") sstring = sstring.substring(1);
        return sstring;
      }
      
	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")
          {
            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")
          {
            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")
          {
            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")
          {
            alert(field.value + " is not a relative link !");
          }
          return false;
        }
        else 
        {
          return true;
        }
      }    
  
      function schrikkelyear(year)
      {
        if((year % 4) == 0)
        {
          if((year % 100) == 0)
          {
            result = ((year % 400) == 0);
          }
          else
          {
            result = true;
          }
        }
        else
        {
          result = false;
        }
        return result;
      }


      function TrimZeroes(numstring)
      {
        while(numstring.charAt(0) == "0") numstring = numstring.substring(1);
        if(numstring == "") numstring = "0";
        return numstring;
      }

      function CheckNumberField(field,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 !");
          }
          else if(langcode == "NL")
          {
            alert("\'" + field.value + "\' is geen nummer of is te groot !");
          }
          else if(langcode == "EN")
          {
            alert("\'" + field.value + "\' is not a number or is too big !");
          }
          field.value="";
          return false;
        }
        else 
        {
          return true;
        }
      }

      function CheckNumberField2(field,fieldvalue,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(fieldvalue + " \'" + field.value + "\' n'est pas un numero ou est trop grand !");
          }
          else if(langcode == "NL")
          {
            alert(fieldvalue + " \'" + field.value + "\' is geen nummer of is te groot !");
          }
          else if(langcode == "EN")
          {
            alert(fieldvalue + " \'" + field.value + "\' is not a number or is too big !");
          }
          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")
          {
            alert(field.value + " contains too many characters ! (maximum " + max + ")");
          }
          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")
            {
              alert(datefield + " is not a valid date");
            }            
            yearfield.value = "";
            monthfield.value = "";
            dayfield.value = "";
            return false
          }
          else
          {
            return true;
          }
        }
        else
        {
          if(!(CheckNumberField(yearfield,   2070, 1, 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")
            {
              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 == "")
        {
          alert(fieldname);
          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("Gelieve het veld '" + fieldname + "' in te vullen.");
          }
          else if(langcode == "EN")
          {
            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")
          {
            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)
              { 
                alert(fieldname);
                return false;
              }
              else 
              {
                return true;
              }
      }


	function CheckMandatoryRadioNoAlert(field)
            {
              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)
              {
                
                return false;
              }
              else 
              {
                return true;
              }
      }


      function CheckMandatorySelect(field, fieldname, langcode)
      {
        checked = false;
        for(i = 0 ;i < field.length ; i++)
        {
          if(field[i].checked )
          {
            checked = true ;
          }
        }
        if(checked == false )
        {
          alert(fieldname);                 
          return false;
        }
        else 
        {
          return true;
        }
      }
 
     function CheckMandatoryList(field, fieldname, langcode)
      {
        if(field.value == '' )
        {
          alert(fieldname);                 
          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 \(ex. 'f.daenen@skynet.be'\).")
        }
        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 \(bv. 'f.daenen@skynet.be'\).")
        }
        else if (langcode == "EN")
        {
          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")
        {
          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")
        {
          alert(fieldname + ": destination IP address is invalid!")
        }
        else if (langcode == "NL")
        {
          alert(fieldname + ": destination IP address is invalid!")
        }        
              
        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 \(ex. 'info@stella-artois.be'\).")
        }
        else if (langcode == "EN")
        {
          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 \(bv. 'info@stella-artois.be'\).")
        }        

        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")
        {
          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")
        {
          alert(fieldname + ": This address is missing a hostname!")
        }
        else if (langcode == "NL")
        {
           alert(fieldname + ": This address is missing a hostname!")
        }        

       return false
    }
    // If we've gotten this far, everything's valid!
    return true;
    }
 
 
    //-->

    //-->