Simple popup or dialog box in Google Apps Script

Question

I\'m looking for simple code that adds a popup in my Google Apps Script Ui that comes up when I hit a submit button. The popup box would display a message and have a button

Answer 1

Popup - use something like this:

      var table = app.createFlexTable();
      table.setStyleAttribute("position", "absolute");
      table.setStyleAttribute("background", "white");      

add items to the table and hide and show as needed.