var isNN = (navigator.appName.indexOf("Netscape")!=-1);

function pntDateUpdate(hiddenId,input, e) { 
	var hiddenField = document.getElementById(hiddenId); 
	var d = document.getElementById(hiddenId+'Day').value; 
	var m = document.getElementById(hiddenId+'Month').value; 
	var y = document.getElementById(hiddenId+'Year').value;	

	if (isNaN(parseInt(d))) d = '';
	if (isNaN(parseInt(m))) m = '';
	if (isNaN(parseInt(y))) y = ''
	
	if (parseInt(m) > 12) {
		m = 12;
		document.getElementById(hiddenId+'Month').value = 12;
	} 
	var pntDate = '';
	if (d>0 || m>0 || y>0) {
		pntDate = d+'-'+m+'-'+y;
	}
	hiddenField.value = pntDate;
}

function pntDateFillDates(hiddenId) {
	var pntDate = document.getElementById(hiddenId).value;
	var dateArray = pntDate.split("-");		
	var d = document.getElementById(hiddenId+'Day');
	var m = document.getElementById(hiddenId+'Month');
	var y = document.getElementById(hiddenId+'Year');
	 
	if(d.value!=dateArray[0] || m.value != dateArray[1] || y.value != dateArray[2]) {
		d.value = dateArray[0];
		m.value = dateArray[1];
		y.value = dateArray[2];
	}
	
}
function limitText(limitField, limitNum) {
    if (limitField.value.length > limitNum) {
        limitField.value = limitField.value.substring(0, limitNum);
    } 
    return false;
}

function autoTab(input, e) {
	//autotab is erafgehaald om
		//1) het soms irritant is
		//2) de datum dan in IE7 niet bijgewerkt wordt
	var keyCode = (isNN) ? e.which : e.keyCode; 
  var filter = (isNN) ? [0,8,9] : [0,8,9,16,17,18,37,38,39,40,46];
  var len = input.maxLength;
  if(input.value.length >= len && !containsElement(filter,keyCode)) {
    input.value = input.value.slice(0, len);
    var elem = input.form[(getIndex(input)+1) % input.form.length];
    if (elem.type != "hidden") elem.focus();
  }

  function containsElement(arr, ele) {
    var found = false, index = 0;
    while(!found && index < arr.length)
    if(arr[index] == ele)
    found = true;
    else
    index++;
    return found;
  }

  function getIndex(input) {
    var index = -1, i = 0, found = false;
    while (i < input.form.length && index == -1)
    if (input.form[i] == input)index = i;
    else i++;
    return index;
  }
  return true;
}