var ns4 = (document.layers);
var ie4 = (document.all);
var ie5 = (document.all && document.getElementById);
var ns6 = (!document.all && document.getElementById);

function show(id){
	// Netscape 4
	if(ns4){
		document.layers[id].visibility = "show";

	}
	// Explorer 4
//	else if(ie4){
//		document.all[id].style.visibility = "visible";
//	}
	// W3C - Explorer 5+ and Netscape 6+
//	else if(ie5 || ns6){
//		document.getElementById(id).style.visibility = "visible";
//	}
}

function hide(id){
	// Netscape 4
	if(ns4){
		document.layers[id].visibility = "hide";
	}
	// Explorer 4
	else if(ie4){
		document.all[id].style.visibility = "hidden";
	}
	// W3C - Explorer 5+ and Netscape 6+
	else if(ie5 || ns6){
		document.getElementById(id).style.visibility = "hidden";
	}
}