rem: aEvent.preventBubble(); 
add: aEvent.stopPropagation(); 
context: function onViewMenuColumnItemSelected(aEvent){  var colid = aEvent.target.getAttribute("colid");  if (colid != "") {    var bookmarksView = document.getElementById("bookmarks-view");    bookmarksView.toggleColumnVisibility(colid);  }    aEvent.preventBubble();}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/9421/4b6dc2a2c7e2e1c990786f51ddda6ffe699c5f2f/bookmarksManager.js/clean/suite/common/bookmarks/bookmarksManager.js