function $_(id) {
	return document.getElementById(id);
}

window.onload = function() {
	initLightbox();
}

function clearField(field) {
	field.value = '';
}

function delConfirm() {
	if (confirm("Weet u dit zeker?")) {
		return true;
	} else {
		return false;
	}
}

function showExtraInfo(id) {
	if ($_(id).style.display == "none") {
		$_(id).style.display = "table-row";
	} else {
		$_(id).style.display = "none";
	}
}