rem: var parentNode = element.parentNode; return drop._containers.detect(function(c) { return parentNode == c }); 
add: var containmentNode; if(drop.tree) { containmentNode = element.treeNode; } else { containmentNode = element.parentNode; } return drop._containers.detect(function(c) { return containmentNode == c }); 
context:   isContained: function(element, drop) {    var parentNode = element.parentNode;    return drop._containers.detect(function(c) { return parentNode == c });  },
meta: 258	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/258/bb2276098a5a21c35e5ee72b3097bd9d7caa919f/dragdrop.js/buggy/actionpack/lib/action_view/helpers/javascripts/dragdrop.js