rem: var level = aTree.view.getLevel(aRow); 
add: var row = aRow; var level = aTree.view.getLevel(row); 
context: function GetParentRow(aTree, aRow){  var level = aTree.view.getLevel(aRow);  var parentLevel = level;  while (aRow >= 0 && parentLevel >= level) {    parentLevel = aTree.view.getLevel(aRow);    --aRow;  }  return aRow;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/8ea3186c396d0b249ab0746ea0f3323b464a118a/abCommon.js/buggy/mailnews/addrbook/resources/content/abCommon.js