<html>

<head>
<script>
function trim(item)
{
worker = new String(item);

if (worker.indexOf(" ") != -1)
{
if (worker.indexOf(" ") == 0)
{
worker = worker.substring(1,worker.length);
trim(worker);
}
}
if (worker.lastIndexOf(" ") != -1)
{
if (worker.lastIndexOf(" ") >= worker.length-1)
{
worker = worker.substring(0,worker.length-1);
trim(worker);
}
}

return worker;
}
</script>
</head>

<body>
<script>
var x="AQ";
var y="AQ";
x=trim(x);
y=trim(y);
alert(x == y);
</script>

</body>

</html>

l'alert mi restituisce false..............