function popup(url) {
	var w = 910;
	var h = 750;
	var l = (screen.width - w) / 2;
	var t = (screen.height - h) / 4;
	var w = window.open(url, 'ANWB_POPUP', 'width='+w+',height='+h+',top='+t+',left='+l+',scrollbars=yes,toolbar=no,location=no,top=200,left=200');
	w.focus();
	return false;
} 

function popupWebsite(url) {
	var w = 1024;
	var h = 768;
	var l = (screen.width - w) / 2;
	var t = (screen.height - h) / 4;
	var w = window.open(url, 'ANWB_POPUPWEBSITE', 'width='+w+',height='+h+',top='+t+',left='+l+',scrollbars=yes,toolbar=no,location=no,top=200,left=200');
	w.focus();
	return false;
} 

function popupFotos(url) {
	var w = 350;
	var h = 600;
	var l = (screen.width - w) / 2;
	var t = (screen.height - h) / 4;
	var w = window.open(url, 'ANWB_FOTOS', 'width='+w+',height='+h+',top='+t+',left='+l+',scrollbars=yes,toolbar=no,location=no,top=200,left=200');
	w.focus();
	return false;
}

function popupFilmpjes(url) {
	var w = 470;
	var h = 380;
	var l = (screen.width - w) / 2;
	var t = (screen.height - h) / 4;
	var w = window.open(url, 'ANWB_FILMPJES', 'width='+w+',height='+h+',top='+t+',left='+l+',scrollbars=no,toolbar=no,location=no,top=200,left=200');
	w.focus();
	return false;
}

function maxlength(oTextArea, iMaxLength, resterendElem) {
	if (oTextArea.value.length > iMaxLength) {
		oTextArea.value = oTextArea.value.substring(0, iMaxLength);
	}
	if (resterendElem != null) {
		resterendElem.value = iMaxLength - oTextArea.value.length;
	}
}