function hide1(id,nest){if(document.layers){if(nest)
document.layers[nest].document.layers[id].visibility="hidden"
else document.layers[id].visibility="hidden"}else if(document.all) document.all[id].style.visibility="hidden"}
var right
function show0(id,nest){if(document.layers){if(nest) document.layers[nest].document.layers[id].visibility="visible"
else document.layers[id].visibility="visible"}else if(document.all) document.all[id].style.visibility="visible"}

function hide(id){id.style.display = "none"}
function show(id){id.style.display = "block"}

function left2right(field) {if (field.value == "q"){right=1}else{alert('Carattere errato o mancante.');show(test);field.focus();field.select();right=0;}}
function hide_line(field) {
if (field.value != "o")  {alert('Il quinto carattere è errato.');show(test);field.focus(); field.select();good= false;}}
function showline(field) {if (field.value == "v"){ } else  {alert('Il quarto carattere è errato.');show(test);field.focus(); field.select();good = false;}}