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: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/ae8d2257a0eb424678d80daa7c3a8e3e433d0077/MsgComposeCommands.js/clean/mailnews/compose/resources/content/MsgComposeCommands.js