How to Return to main window in same tab ?

Hi, I have open another window using var list_tab_view = require('tab1_continue').Apptablelistscreen; new list_tab_view().open();

now i want to return to previous window on click clicklistner of button i have used code below

Home.addEventListener('click',function(e) {

      var list_tab_view = require('screen3').screen3main;
      new list_tab_view().open();
});

it gives error i.e

Message: Uncaught TypeError: object is not a function [ERROR][TiJSError( 690)] (main) [1,54620] - Source: new list_tab_view().open();

can u help i have also tried to use

    var tabGroup = Ti.App.tbGrp;
      tbGroup.tabs[1].active = true;
      tabGroup.open();

it gives undefined tabs ..
plz help