rem: ShowMenuItem(menuID, (numSelected <= 1) && !forceHide); EnableMenuItem(menuID, false); 
add: ShowMenuItem(menuID, (numSelected <= 1) && !forceHide); EnableMenuItem(menuID, false); 
context: function SetupAddSenderToABMenuItem(menuID, numSelected, forceHide){	ShowMenuItem(menuID, (numSelected <= 1) && !forceHide);	EnableMenuItem(menuID, false);}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/0b2dd2b2d2fd037df917e07645fa019a963332a5/mailContextMenus.js/clean/mailnews/base/resources/content/mailContextMenus.js