function swapdisplay(tag)
{
	var tagA = tag + "a"
	var tagB = tag + "b"

	if (document.getElementById) 
	{
		var state = document.getElementById(tagA).style.display;
	}
	else if (document.all)    
	{
		var state = document.all[tagA].style.display;
	}

	var newStateA = "";
	var newStateB = "";

	if ( state == "block")
	{
		newStateA = "none";
		newStateB = "block";

	} else {
		newStateA = "block";
		newStateB = "none";
	}


	if (document.getElementById)
	{
		document.getElementById(tagA).style.display = newStateA;
		document.getElementById(tagB).style.display = newStateB;
	}
	else if (document.all)
	{
		document.all[tagA].style.display = newStateA;
		document.all[tagB].style.display = newStateB;
	}
}