rem: Element[Element.visible(element) ? 'show' : 'hide'](element); 
add: element.style.display = (element.style.display == 'none' ? '' : 'none'); 
context:   toggle: function() {    for (var i = 0; i < arguments.length; i++) {      var element = $(arguments[i]);      Element[Element.visible(element) ? 'show' : 'hide'](element);    }  },
meta: 3991	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/3991/57687341792749db94b850962ee7ed7f18e1087d/prototype.js/clean/manager/media/script/scriptaculous/prototype.js