rem: var menuItem = document.getElementById(menuItemId); if(menuItem) menuItem.setAttribute('label', customLabel); 
add: var menuItem = document.getElementById(menuItemId); if (menuItem) menuItem.setAttribute('label', customLabel); 
context: function SetMenuItemLabel(menuItemId, customLabel){    var menuItem = document.getElementById(menuItemId);    if(menuItem)        menuItem.setAttribute('label', customLabel);}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/6b6e8fc76969489aa0909d3b599afcb02b4d026b/mailWindowOverlay.js/clean/mail/base/content/mailWindowOverlay.js