function (obj)
    {
        if (obj === null)
            return "null";

        if (this.isPrimitiveValue(obj))
            return null;

        if (this._isHTMLAllCollection(obj))
            return "array";

        var preciseType = InjectedScriptHost.type(obj);
        if (preciseType)
            return preciseType;

        // FireBug's array detection.
        try {
            if (typeof obj.splice === "function" && isFinite(obj.length))
                return "array";
            if (Object.prototype.toString.call(obj) === "[object Arguments]" && isFinite(obj.length)) // arguments.
                return "array";
        } catch (e) {
        }

        // If owning frame has navigated to somewhere else window properties will be undefined.
        return null;
    }