function uitklap(id) {
	var lText = this.innerHTML;
	var d = document.getElementById('edit'+id); 
	if (lText == '<img src="images/edit.gif" alt="" title="verander afspraak">') { 
		this.innerHTML = '-'; 
		d.style.display = 'block';
	} else { 
		this.innerHTML = '<img src="images/edit.gif" alt="" title="verander afspraak">';
		d.style.display = 'none';
	}
}