rem: K: function(x) {return x} 
add: K: function(x) { return x } 
context:   K: function(x) {return x}
meta: 1378	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1378/55c6c64da0fbbfba74a0b4ad68022bf640a0a049/prototype.js/buggy/actionpack/lib/action_view/helpers/javascripts/prototype.js