function layershowhide(id, action) {
	ns4 = (document.layers) ? true:false 
	ie4 = (document.all) ? true:false 
	ng5 = (document.getElementById) ? true:false
	if (action=="hide") {
		if (ng5) document.getElementById(id).style.visibility = "hidden";
		else if (ns4) document.layers[id].visibility = "hide";
		else if (ie4) document.all[id].style.visibility = "hidden";
		if (ng5) document.getElementById(id).style.display = "none";
		else if (ns4) document.layers[id].display = "none";
		else if (ie4) document.all[id].style.display = "none";
	} else {
		if (ng5) document.getElementById(id).style.visibility = "visible";
		else if (ns4) document.layers[id].visibility = "show";
		else if (ie4) document.all[id].style.visibility = "visible";
		if (ng5) document.getElementById(id).style.display = "block";
		else if (ns4) document.layers[id].display = "block";
		else if (ie4) document.all[id].style.display = "block";
	}
}