In some cases, the JavaScript triple equals sign operator can simplify variable type and value checking. The operator tests both type and value for equivalency. Here's a simple example HTML page that illustrates the technique.
<html>
<head></head>
<body>
<Script>
var a=1; // Numeric Value
var b=1; // Numeric Value
var c="1"; // String Value
var d="1"; //String Value
alert(a===b); // Alerts 'true' as both variables are numeric,having value 1
alert(c===d); // Alerts 'true' as both variables are string,having value 1
alert(b===c); // Alerts 'false'as both variables are different type,having value 1
</script>
</body>
</html>
