<!--

var defaultEmptyOK = false;
var whitespace = " \t\n\r";
var mPrefix = "The field "
var mSuffix = " is empty.\nThis is a required field."
var decimalPointDelimiter = ","

function isEmpty(s)
{   return ((s == null) || (s.length == 0))
}

function isDigit (c)
{   return ((c >= "0") && (c <= "9"))
}

function isEmpty(s)
{   return ((s == null) || (s.length == 0))
}


function IsEmail(oField, layoutName)
{
	var sErrorMessage = 'The E-mailaddress is not a valid e-mailaddress';
	
	if(oField.value == "")
		return true;
		
	var x = oField.value
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9])+$/;
	if (filter.test(x))
	{
		return true;
	}
	else
	{
		
		alert(sErrorMessage);
		oField.focus();
		return false;
	}
}
function checkString (theField, s, emptyOK)
{   
    if (checkString.arguments.length == 2) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    if (isWhitespace(theField.value)) 
       return warnEmpty (theField, s);
    else return true;
}

function checkRadioButton(oField, layoutName)
{
	for(i=0;i<oField.length;i++)
	{
		if(oField[i].checked == true)
			return true;
	}
	alert(layoutName + ' is required.');

	return false;
}


function checkCheckBox(oField, layoutName)
{
	var iLength;
	iLength = oField.length;
	
	if(!oField.length)
	{
		if(oField.checked == false)
		{
			alert(layoutName + " must be checked.");
			return false;
		}
	}
	else
	{
		for(i=0;i<oField.length;i++)
		{
			if(oField[i].checked == true)
				return true;
		}
		alert("There must be checked at least one " + layoutName);
		return false;
	}
	
	return true;

}

function warnEmpty (theField, s)
{  
	//theField.focus()
    alert(mPrefix + s + mSuffix)
    return false
}

function isWhitespace (s)
{   
	var i;

    if (isEmpty(s)) return true;
    for (i = 0; i < s.length; i++)
    {   
        var c = s.charAt(i);
        if (whitespace.indexOf(c) == -1) return false;
    }
    return true;
}

function CheckDate(oDate, oLayout)
{
	var dDate;
		
	dDate = makeDate(document.frm[oDate][0],document.frm[oDate][1],document.frm[oDate][2]);
	//alert(dDate);
		
	//if(dDate == "")
	//{
		//alert(oLayout + " is een verplicht veld.");
		
		//return false;
	//}
		
	if(dDate != "false")
	{
		document.frm["_" + oDate].value = dDate;
		return true;
	}
		
	return false;
		
}

function makeDate(Day, Month, Year)
{
	
	Day = Day.value.toString();
	Month = Month.value.toString();
	Year = Year.value.toString();
	
	if(Day == "" && Month == "" && Year == "")
	{
		sValue = ""
		return sValue;
	}
	
	if(Day == "")
	{
		alert('Day is missing.');
		return 'false';
	}
	if(Month == "")
	{
		alert('Month is missing.');
		return 'false';
	}
	if(Year == "")
	{
		alert('Year is missing.');
		return 'false';
	}
	if(isNaN(Year))
	{
		alert('Year is not numeric.');
		return 'false';
	}
	if(Year.length != 4)
	{
		alert("Year should contain 4 digits.");
		return 'false';
	}
	
	var sDateReturn = Month + "/" + Day + "/" + Year;
	//alert(sDateReturn);
	
	//if (!isDate(Day,Month,Year))
	//{
		//alert('U heeft geen juiste datum opgegeven');
		//return 'false';
	//}
	//else
	//{
		return sDateReturn;
	//}

}
//-->