function dateFilter(date) {
	filteredValues = "-";     // Characters stripped out
	var i;
	var returnString = "";
	for (i = 0; i < date.length; i++) {  // Search through string and append unfiltered values to returnString.
	var c = date.charAt(i);
	if (filteredValues.indexOf(c) == -1) returnString += c;
	}
	return returnString;
}

function Left(str, n){
	if (n <= 0)
	    return "";
	else if (n > String(str).length)
	    return str;
	else
	    return String(str).substring(0,n);
}


function checkFloat(field)
{
	pattern = /^\d+(?:\.\d{0,2})?$/; //getal met max 2 decimalen
	
	if(pattern.test(field.value)==false)
	{
		var veldlengte = field.value.length;
		var newvalue = Left(field.value, veldlengte-1);
		field.value = newvalue;
		if (veldlengte > 1) {
			checkFloat(field);
		}
	}
}

function checkInt(field)
{
	pattern = /^\d+$/; //getal met max 2 decimalen
	
	if(pattern.test(field.value)==false)
	{
		var veldlengte = field.value.length;
		var newvalue = Left(field.value, veldlengte-1);
		field.value = newvalue;
		if (veldlengte > 1) {
			checkFloat(field);
		}
	}
}

function setDagVullend(obj) {
	if(obj.value == 'ja') {
		//velden initialiseren
		document.getElementById('EVE_TijdVanUren').selectedIndex = 0;
		document.getElementById('EVE_TijdVanMinuten').selectedIndex = 0;
		document.getElementById('EVE_TijdVanUren').disabled = true;
		document.getElementById('EVE_TijdVanMinuten').disabled = true;	
		document.getElementById('EVE_DatumTot').value = document.getElementById('EVE_DatumVan').value;
		document.getElementById('disp_EVE_DatumTot').innerHTML = document.getElementById('EVE_DatumVan').value;
		document.getElementById('EVE_TijdTotUren').selectedIndex = 0;
		document.getElementById('EVE_TijdTotMinuten').selectedIndex = 0;
		document.getElementById('EVE_TijdTotUren').disabled = true;
		document.getElementById('EVE_TijdTotMinuten').disabled = true;	
	} else {
		document.getElementById('EVE_TijdVanUren').disabled = false;
		document.getElementById('EVE_TijdVanMinuten').disabled = false;	
		document.getElementById('EVE_TijdTotUren').disabled = false;
		document.getElementById('EVE_TijdTotMinuten').disabled = false;			
	}
}