rem: element = Event.element(event); while (element.tagName.toUpperCase() != tagName.toUpperCase() && element.parentNode) 
add: var element = Event.element(event); while (element.parentNode && (!element.tagName || (element.tagName.toUpperCase() != tagName.toUpperCase()))) 
context:   findElement: function(event, tagName) {    element = Event.element(event);    while (element.tagName.toUpperCase() != tagName.toUpperCase()         && element.parentNode)      element = element.parentNode;    return element;  },
meta: 3903	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/3903/d763f08ba81f0e3e4aac9c09f0342a2a53254211/prototype.js/clean/actionpack/lib/action_view/helpers/javascripts/prototype.js