Google Apps Script to display email notification

gistfile1.js

function doGet(e) {
  try{
    var app = UiApp.createApplication();
    var mainPanel = app.createVerticalPanel();
    var emailTable = app.createFlexTable().setId("emailTable");
    app.add(mainPanel);
    mainPanel.add(emailTable);
    var mail = GmailApp.getInboxThreads(0, 10);
    for (var i = mail.length; i > 0; i--) {
      var msg = mail[i-1];
      var subject = msg.getFirstMessageSubject();
      var msgDate = modDate(msg.getLastMessageDate());
      var msgCount = msg.getMessageCount();
      if (msgCount > 1){
        var msgCountTxt = "("+msgCount+")";
      } else {
        var msgCountTxt = "";
      }
      var rec = msg.getLastMessageDate();
      var status = msg.isUnread();
      var msgs = msg.getMessages();
      var msgTxt = msgs[msgs.length-1].getBody().replace(/<[^>]*>?/g, '');
      //msgTxt = msgTxt.substring(1,30);
      msgTxt = msgTxt.replace(/\n/g, ' ');
      var frm = getEmailFromString(msgs);
      //Logger.log("why "+msgTxt);
      var textString = frm + " " + msgCountTxt + "- " + subject + " - " + msgTxt;
      var textString  = textString.substring(0,70);
      Logger.log(textString);
      var textLabel = app.createLabel().setText(textString);
      var dateLabel = app.createLabel().setText(msgDate);
      
      emailTable.setWidget(mail.length-i, 0, textLabel);
      emailTable.setWidget(mail.length-i, 1, dateLabel);
     
    }
     //Logger.log(date);  
      return app;
  } catch(error){
    ScriptProperties.setProperty('debug', error);//errorsAndTesting('function doGet', error);
  }

}
function modDate(aDate){
  var today = new Date();
  today.setHours(0,0,0,0);
  if (today <= aDate){
    var resp =  Utilities.formatDate(aDate, "GMT", "HH:mma");
    resp = resp.toLowerCase();
  } else {
    var resp =  Utilities.formatDate(aDate, "GMT", "dd MMM");
  }
  return resp;
}
function getEmailFromString(msgs){
  var users = [];
  var fromStr = "";
  for (var i = 0; i < msgs.length; i++) {
    var frm = msgs[i].getFrom();
    users.push(frm);
  }
  for (var u in users){
      if (users[u] !='') {
        temp = users[u].split(' ');
        fromStr += temp[0] +", "; 
      }
  }
  fromStr = fromStr.substr(0,fromStr.length-2);
  return fromStr
}