add: case "button_delete": 
context:     supportsCommand: function(command)	{        switch ( command )		{			case "cmd_selectAll":			case "cmd_delete":                return true;			default:				return false;		}	},
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/26fbbb140ddd210eae5945dfc04dfa2ace7bfbbf/abCommon.js/buggy/mailnews/addrbook/resources/content/abCommon.js