function trim(inputString) {
   // Removes leading and trailing spaces from the passed string. Also removes
   // consecutive spaces and replaces it with one space. If something besides
   // a string is passed in (null, custom object, etc.) then return the input.
   if (typeof inputString != "string") { return inputString; }
   var retValue = inputString;
   var ch = retValue.substring(0, 1);
   while (ch == " ") { // Check for spaces at the beginning of the string
      retValue = retValue.substring(1, retValue.length);
      ch = retValue.substring(0, 1);
   }
   ch = retValue.substring(retValue.length-1, retValue.length);
   while (ch == " ") { // Check for spaces at the end of the string
      retValue = retValue.substring(0, retValue.length-1);
      ch = retValue.substring(retValue.length-1, retValue.length);
   }
   while (retValue.indexOf("  ") != -1) { // Note that there are two spaces in the string - look for multiple spaces within the string
      retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length); // Again, there are two spaces in each of the strings
   }
   return retValue; // Return the trimmed string back to the user
} // Ends the "trim" function


function replace(inputString, fromString, toString) {
   // Goes through the inputString and replaces every occurrence of fromString with toString
   inputString = trim(inputString);
   fromString = trim(fromString);
   toString = trim(toString);
   var temp = inputString;
   if (fromString == "") {
      return temp;
   }
   if (toString.indexOf(fromString) == -1) { // If the string being replaced is not a part of the replacement string (normal situation)
      while (temp.indexOf(fromString) != -1) {
         var toTheLeft = temp.substring(0, temp.indexOf(fromString));
         var toTheRight = temp.substring(temp.indexOf(fromString)+fromString.length, temp.length);
         temp = toTheLeft + toString + toTheRight;
      }
   } else { // String being replaced is part of replacement string (like "+" being replaced with "++") - prevent an infinite loop
      var midStrings = new Array("~", "`", "_", "^", "#");
      var midStringLen = 1;
      var midString = "";
      // Find a string that doesn't exist in the inputString to be used
      // as an "inbetween" string
      while (midString == "") {
         for (var i=0; i < midStrings.length; i++) {
            var tempMidString = "";
            for (var j=0; j < midStringLen; j++) { tempMidString += midStrings[i]; }
            if (fromString.indexOf(tempMidString) == -1) {
               midString = tempMidString;
               i = midStrings.length + 1;
            }
         }
      } // Keep on going until we build an "inbetween" string that doesn't exist
      // Now go through and do two replaces - first, replace the "fromString" with the "inbetween" string
      while (temp.indexOf(fromString) != -1) {
         var toTheLeft = temp.substring(0, temp.indexOf(fromString));
         var toTheRight = temp.substring(temp.indexOf(fromString)+fromString.length, temp.length);
         temp = toTheLeft + midString + toTheRight;
      }
      // Next, replace the "inbetween" string with the "toString"
      while (temp.indexOf(midString) != -1) {
         var toTheLeft = temp.substring(0, temp.indexOf(midString));
         var toTheRight = temp.substring(temp.indexOf(midString)+midString.length, temp.length);
         temp = toTheLeft + toString + toTheRight;
      }
   } // Ends the check to see if the string being replaced is part of the replacement string or not
   return temp; // Send the updated string back to the user
} // Ends the "replaceSubstring" function

function isValidChar(str,par_invalidChars){
	var invalidChars = " ~\'^\`\"*+=\\|][(){}$&!#%/:,;";
	var ok = true;
	
	if (par_invalidChars != "")
	{
		invalidChars = par_invalidChars
	}
		
	 for (i=0; i<invalidChars.length; i++) {
        badChar = invalidChars.charAt(i);
        if (str.indexOf(badChar,0) > -1) {
			ok = false
        }
    }
	
	return ok;
}

function isEmail(email) {
    invalidChars = " ~\'^\`\"*+=\\|][(){}$&!#%/:,;";
	email = emailStr = trim(email);
    // Check for null
    if (email == "") {
        return false;
    }

    // Check for invalid characters as defined above
    for (i=0; i<invalidChars.length; i++) {
        badChar = invalidChars.charAt(i);
        if (email.indexOf(badChar,0) > -1) {
            return false;
        }
    }
    lengthOfEmail = email.length;
    if ((email.charAt(lengthOfEmail - 1) == ".") || (email.charAt(lengthOfEmail - 2) == ".")) {
        return false;
    }
    Pos = email.indexOf("@",1);
    if (email.charAt(Pos + 1) == ".") {
        return false;
    }
    while ((Pos < lengthOfEmail) && ( Pos != -1)) {
        Pos = email.indexOf(".",Pos);
        if (email.charAt(Pos + 1) == ".") {
            return false;
        }
        if (Pos != -1) {
            Pos++;
        }
    }

    // There must be at least one @ symbol
    atPos = email.indexOf("@",1);
    if (atPos == -1) {
        return false;
    }

    // But only ONE @ symbol
    if (email.indexOf("@",atPos+1) != -1) {
        return false;
    }

    // Also check for at least one period after the @ symbol
    periodPos = email.indexOf(".",atPos);
    if (periodPos == -1) {
        return false;
    }
    if (periodPos+3 > email.length) {
        return false;
    }
    return true;
}

function CheckVeld(Veld, Language)
{
	var bOk = true;;
	var Veldwaarde = Veld.value;
	var Veldnaam = Veld.id
	var Verplicht = Veldnaam.substring(Veldnaam.length - 2, Veldnaam.length -1)
	var Actie = Veldnaam.substring(Veldnaam.length - 1, Veldnaam.length)
	Veldnaam = Veldnaam.substring(0, Veldnaam.length - 2)
	
	var melding;
	var meldingleeg = "Veld mag niet leeg blijven"; 
	var meldingnumeric = "Veld dient numerieke waarde te hebben";
	var meldingemail = "Geen geldig emailadres";
	var meldingalgemeen = "Geef geldige waarde voor '";
	
	if (Language.toUpperCase() == 'EN')
	{
		meldingleeg = "Field should not be empty"; 
		meldingnumeric = "Field should have a numeric value"; 
		meldingemail = "No valid emailadress"; 
		var meldingalgemeen = "Give valid value for '";
	}
	
	if (Verplicht == 1 && Veldwaarde == "") 
	{	
			bOk = false;
			melding = meldingleeg;
	}		
	else
	{
		if (Actie==1) 
		{
			if (Number(Veldwaarde) != Veldwaarde) 
			{
				bOk = false;
				melding = meldingnumeric;
			}
		}
		else if (Actie==2) 
		{
			if (!isEmail(Veldwaarde)) 
			{	
				bOk = false;						
				melding = meldingemail;
			}
		}

	}
	if (bOk == false)
	{	
		alert (meldingalgemeen + Veldnaam + "'\n" + melding);
		Veld.focus();
	}	
	return bOk;
}	

function CheckAndSubmit(language)
{
	var controls = document.getElementsByTagName("input");
	var bOk = true;
	for (var i = 0; i < controls.length; i++) 
    {
		var control = controls.item(i);
		if(!CheckVeld(control,language))
		{
        	bOk = false;
            i = controls.length + 1;
		}	
    }
    if (bOk)
    {
		controls = document.getElementsByTagName("textarea");
		for (var i = 0; i < controls.length; i++) 
		{
	   		var control = controls.item(i);
	   		if(!CheckVeld(control,language))
			{
	        	bOk = false;
				i = controls.length + 1;
			}	
		} 
	}	
	if (bOk)
    {
		window.document.all.frmMail.submit();
    }
}