//Function to show the layer
function showLayer(layerID){
	var layer=document.getElementById(layerID);
	layer.style.visibility="visible"
    	window.event.srcElement.style.color = "blue";
    	window.event.srcElement.style.fontSize = "12px";
	window.event.srcElement.style.fontWeight="bold";
	return true
}

//function to hide the layer
function hideLayer(layerID){
	var layer=document.getElementById(layerID);
	layer.style.visibility="hidden"
    	window.event.srcElement.style.color = "black";
    	window.event.srcElement.style.fontSize = "12px";
	window.event.srcElement.style.fontWeight="normal";
	return true
}