function toggle( targetId, sourceId){
target = document.getElementById( targetId );
if (sourceId.checked){
target.style.display = "";
} else {
target.style.display = "none";
}
}

function toggle_off(targetId, sourceId)
{
	target = document.getElementById( targetId );
	if (sourceId.checked)
	{
		target.style.display = "none";
	}
	else
	{
		target.style.display = "";
	}
}

function toggle_on(targetId, sourceId)
{
	target = document.getElementById( targetId );
	if (sourceId.checked)
	{
		target.style.display = "";
	}
	else
	{
		target.style.display = "none";
	}
}