//hide and show div
function toggleLayer(whichLayer) {
	if (document.getElementById)
	{
		// this is the way the standards work
		var style2 = document.getElementById(whichLayer).style;
		style2.display = (style2.display=="block") ? "none" : "block";
	}
	else if (document.all)
	{
		// this is the way old msie versions work
		var style2 = document.all[whichLayer].style;
		style2.display = (style2.display=="block") ? "none" : "block";
	}
	else if (document.layers)
	{
		// this is the way nn4 works
		var style2 = document.layers[whichLayer].style;
		style2.display = (style2.display=="block") ? "none" : "block";
	}
}