public SlideUp(HtmlElement el, BlindOptions options) : base(el, options) { }
public BlindDown(HtmlElement el, BlindOptions options) : base(el, options) { }
public SlideUp(JsString id_of_element, BlindOptions options) : base(id_of_element, options) { }
public BlindDown(JsString id_of_element, BlindOptions options) : base(id_of_element, options) { }