function closediv(layerId) {
	if(!document.getElementById){return};
	var theElement = document.getElementById(layerId);
	theElement.style.display = 'none';

}
function opendiv(layerId) {
	if(!document.getElementById){return};
	var theElement = document.getElementById(layerId);
	theElement.style.display = 'block';
}

function switchdiv(layerId) {
	if(!document.getElementById){return};
	var theElement = document.getElementById(layerId);
	if (theElement.style.display == 'block') {
		theElement.style.display = 'none';
	} else {
		theElement.style.display = 'block';
	}
}