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: 3974	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/3974/af9adbf17404d887f31369756326b0109da7ae2b/prototype.js/buggy/root/static/js/prototype.js