return element.checked ? element.value : null; 
if (element.checked) return [element.name, element.value]; 
  inputSelector: function(element) {    return element.checked ? element.value : null;  },
4053	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/4053/99db091466168b09f46c79ff71f0e07c7fd4a8db/prototype.js/clean/lib/prototype.js