rem: Element[Element.visible(element) ? 'show' : 'hide'](element); 
add: Element[Element.visible(element) ? 'hide' : 'show'](element); 
context:   toggle: function() {    for (var i = 0; i < arguments.length; i++) {      var element = $(arguments[i]);      Element[Element.visible(element) ? 'show' : 'hide'](element);    }  },
meta: 3768	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/3768/e3655ef733f7f69a4b1175cd6843f8bfe4c32f5d/prototype.js/clean/railties/html/javascripts/prototype.js