rem: bookmarksView.toggleColumnVisibility(resource); 
add: bookmarksView.toggleColumnVisibility(colid); 
context: function onViewMenuColumnItemSelected(aEvent){  var resource = aEvent.target.getAttribute("resource");  if (resource != "") {    var bookmarksView = document.getElementById("bookmarks-view");    bookmarksView.toggleColumnVisibility(resource);  }    aEvent.preventBubble();}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/4bd77aeaa5e0f06a0b45d56aefcd58fc15da74f1/bookmarksManager.js/buggy/xpfe/components/bookmarks/resources/bookmarksManager.js