/* Toggles div visilibity */
function toggleLayer(whichLayer) {
	if (document.getElementById) {
		var nStyle = document.getElementById(whichLayer).style;
	}
	else if (document.all) {
		var nStyle = document.all[whichLayer].style;
	}
	else if (document.layers) {
		var nStyle = document.layers[whichLayer].style;
	}
	if (nStyle.display == 'block') {
		nStyle.display = 'none';
	} else {
		nStyle.display = 'block';
	}
}