Haxe-alike approach to JavaScript classes

function $extend(from, fields) {
    function inherit() {}; inherit.prototype = from; var proto = new inherit();
    for (var name in fields) proto[name] = fields[name];
    return proto;
}
var Class = function() {
    /* constructor */
};
Class.prototype = $extend(ParentClass, {
    methodName: function(methodArg) {
        /* method contents */
    }
});