index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8" />
    <title>OOP Test</title>
</head>
<body>
    <script src="src/parent.js" charset="utf-8"></script>
    <script src="src/sub.js" charset="utf-8"></script>
    <script>
        if( typeof console === "undefined" )
        {
            console = {
                log : function(msg) {
                    alert( msg );
                }
            }
        }
        var par1 = new ParentClass(0),
            par2 = new ParentClass(1),
            sub1 = new SubClass(2),
            sub2 = new SubClass(3);

        par1.publicMethod();
        par2.publicMethod();
        sub1.publicMethod();
        sub2.publicMethod();

        par1.publicMethod2();
        par2.publicMethod2();
        sub1.publicMethod2();
        sub2.publicMethod2();
    </script>
</body>
</html>