rem: return drop._containers.detect(function(c) { return parentNode == c }); 
add: return drop._containers.detect(function(c) { return containmentNode == c }); 
context:     return drop._containers.detect(function(c) { return parentNode == c });
meta: 1842	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1842/bb2276098a5a21c35e5ee72b3097bd9d7caa919f/dragdrop.js/clean/actionpack/lib/action_view/helpers/javascripts/dragdrop.js