function checkAll(form, checked, name){
	if (checked == true)
	{
		for (var i = 0; i < form.locatie.length; i++)
		{
			form.elements[name][i].disabled = true;
		}
	}
	else
	{
		for (var i = 0; i < form.elements[name].length; i++)
		{
			form.elements[name][i].disabled = false;
		}
	}
}