rem: var item = document.getElementById(id); if(item) { var showing = (item.getAttribute('hidden') !='true'); if(showItem != showing) item.setAttribute('hidden', showItem ? '' : 'true'); } 
add: var item = document.getElementById(id); if(item) { var showing = (item.getAttribute('hidden') !='true'); if(showItem != showing) item.setAttribute('hidden', showItem ? '' : 'true'); } 
context: function ShowMenuItem(id, showItem){	var item = document.getElementById(id);	if(item)	{		var showing = (item.getAttribute('hidden') !='true');		if(showItem != showing)			item.setAttribute('hidden', showItem ? '' : 'true');	}}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/0b2dd2b2d2fd037df917e07645fa019a963332a5/mailContextMenus.js/clean/mailnews/base/resources/content/mailContextMenus.js