rem: if(item) { return(item.getAttribute('hidden') !='true'); } 
add: if (item) return item.hidden != "true"; 
context: function IsMenuItemShowing(menuID){  var item = document.getElementById(menuID);  if(item)  {    return(item.getAttribute('hidden') !='true');  }  return false;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/109055389460d6d94fd47499080050041f949664/mailContextMenus.js/clean/mailnews/base/resources/content/mailContextMenus.js