add: if (!gReceiptOptionChanged) gReceiptOptionChanged = true; 
context: function ToggleReturnReceipt(target){    var msgCompFields = gMsgCompose.compFields;    if (msgCompFields)    {        msgCompFields.returnReceipt = ! msgCompFields.returnReceipt;        target.setAttribute('checked', msgCompFields.returnReceipt);    }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/89f254e0fbcc4411539eeea309b60291dcbb3862/MsgComposeCommands.js/clean/mailnews/compose/resources/content/MsgComposeCommands.js