add: case "button_delete": 
context:     supportsCommand: function(command)	{        switch ( command )		{			case "cmd_selectAll":			case "cmd_delete":                return true;			default:				return false;		}	},
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/af0cf70bfc84facd8974b93e761f3329cf863b3d/abCommon.js/buggy/mailnews/addrbook/resources/content/abCommon.js