// the toggleLayer function dynamically switches the content shown to the user 
function toggleLayer(whichLayer)
{
	//alert('toggleLayer with ' + whichLayer)
	if (document.getElementById)
	{
		// this is the way the standards work
		var style2 = document.getElementById(whichLayer).style;
		style2.display = style2.display? "":"block";
	}
	else if (document.all)
	{
		// this is the way old msie versions work
		var style2 = document.all[whichLayer].style;
		style2.display = style2.display? "":"block";
	}
	else if (document.layers)
	{
		// this is the way nn4 works
		var style2 = document.layers[whichLayer].style;
		style2.display = style2.display? "":"block";
	}
}

// hideLayer function hides a particular layer 
function hideLayer(whichLayer)
{
	//alert('hideLayer with ' + whichLayer)
	if (document.getElementById)
	{
		// this is the way the standards work
		var style2 = document.getElementById(whichLayer).style;
		//style2.display = style2.display? "":"";
		style2.display = style2.display? "none":"none";
	}
	else if (document.all)
	{
		// this is the way old msie versions work
		var style2 = document.all[whichLayer].style;
		//style2.display = style2.display? "":"";
		style2.display = style2.display? "none":"none";
	}
	else if (document.layers)
	{
		// this is the way nn4 works
		var style2 = document.layers[whichLayer].style;
		//style2.display = style2.display? "":"";
		style2.display = style2.display? "none":"none";
	}
}
 
// showLayer function shows a particular layer
function showLayer(whichLayer)
{
	//alert('showLayer with ' + whichLayer)
	if (document.getElementById)
	{
		// this is the way the standards work
		var style2 = document.getElementById(whichLayer).style;
		style2.display = style2.display? "block":"block";
	}
	else if (document.all)
	{
		// this is the way old msie versions work
		var style2 = document.all[whichLayer].style;
		style2.display = style2.display? "block":"block";
	}
	else if (document.layers)
	{
		// this is the way nn4 works
		var style2 = document.layers[whichLayer].style;
		style2.display = style2.display? "block":"block";
	}
}