var ns4=navigator.appVersion.indexOf("MSIE")<0;

function show(id){


    if (ns4){
		document.layers[id].visibility = "show";
	}
	else {
		document.all[id].style.visibility = "visible";
	}
}

function hide(id) {

	if (ns4) document.layers[id].visibility = "hide";
	else document.all[id].style.visibility = "hidden";
}