<html>
<head>
<script>
function displayResult()
{
var x=document.getElementById("pwd").maxLength;
alert(x);
}
</script>
</head>
<body>
<form>
Password: <input type="password" id="pwd" maxlength="8">
</form>
<button type="button" onclick="displayResult()">Display max number of characters allowed</button>
</body>
</html>