Javascript-inheriting an object from a prototype

Tag: Otherwise exists object CTI Var type return row

<script>
    Inheriting an object from a prototype
    Inherit () returns a new object that inherits the properties of the original self-prototype object P
    This uses the Object.create () function in ECMAScript5 (if present)
    If Object.create () is not present. Degradation using other methods
    function inherit (p) {
        P is an object, but cannot be null
        if (p==null) throw TypeError ();
        If Object.create () exists;
        if (object.create)
        Use it directly
            Return Object.create (P);
        Otherwise, further testing is performed
        var t=typeof p;
        Define an empty constructor
        if (t!== "Object" && t!== "function") throw TypeError ();
        Set its prototype property to P
        F.property=p;
        Use F () to create an inherited object of P
        return new F ();
    }
</script>

Javascript-inheriting an object from a prototype