title: i can't navigate from one window to other
body: <p>I want to navigate from Login.js to home.js so anyone who help me for this.</p>
  
  <pre><code>//app.js
  
  var win = Titanium.UI.currentWindow;
  
  var tabbar = Ti.UI.createTabGroup({
      title:"Login"
      });
  
  var mainwin = Ti.UI.createWindow({
      url:"Login/login.js"
      });
  var signupwin = Ti.UI.createWindow({
      url:"Login/Home.js"
      });
  
  var tabLogin = Ti.UI.createTab({
      title:"Login",
      window:mainwin
      });
  
  var tabsignup = Ti.UI.createTab({
      title:"SignUp",
      window:signupwin
      });
  
  var nav = Titanium.UI.iPhone.createNavigationGroup({
      window:mainwin
      });
  
  
  tabbar.addTab(tabLogin);
  tabbar.addTab(tabsignup);    
  tabbar.open({
      transition:Titanium.UI.iPhone.AnimationStyle.CURL_UP
    });
  //-------------------------------------------------------
  //Login.js
  
  //Ti.include('Homescreen/HomeScreen.js');
  
  var win = Ti.UI.currentWindow;
  win.title="Login";
  
  var win1 = Titanium.UI.createWindow({ 
          title:'first window',
          backgroundColor:'#fff'
      });
  
  var lbluser = Ti.UI.createLabel({
          text:"UserName",
          width: 60,
          height: 32,
          left: 10,
          font:{fontcolor:"blue",fontsize:12},
          top: 10
      });
  
  win.add(lbluser);
  
  var username = Titanium.UI.createTextField({
      color:'#336699',
      top:10,
      left:50,
      width:250,
      height:40,
      hintText:'Username',
      keyboardType:Titanium.UI.KEYBOARD_DEFAULT,
      returnKeyType:Titanium.UI.RETURNKEY_DEFAULT,
      borderStyle:Titanium.UI.INPUT_BORDERSTYLE_ROUNDED
  });
  win.add(username);
  
  var lblpass = Ti.UI.createLabel({
          text:"Password",
          width: 60,
          height: 32,
          left: 10,
          top: 50,
          font:{fontcolor:"white",fontsize:12}
      });
  
  win.add(lblpass);
  var password = Titanium.UI.createTextField({
      color:'#336699',
      top:60,
      left:50,
      width:250,
      height:40,
      hintText:'Password',
      passwordMask:true,
      keyboardType:Titanium.UI.KEYBOARD_DEFAULT,
      returnKeyType:Titanium.UI.RETURNKEY_DEFAULT,
      borderStyle:Titanium.UI.INPUT_BORDERSTYLE_ROUNDED
  });
  win.add(password);
  
  var loginBtn = Titanium.UI.createButton({
      title:'Login',
      top:110,
      width:90,
      height:35,
      borderRadius:1,
      font:{fontFamily:'Arial',fontWeight:'bold',fontSize:14}
  });
  win.add(loginBtn);
  
  
  /*
   Login Button Click Event
  */
  
  
  
  loginBtn.addEventListener('click',function(e)
  {
      if (username.value == 'Bimal' &amp;&amp; password.value == 'Pass')
      { 
        alert("ok");
         var home = Ti.UI.createWindow({
            title:"Home Screen",
            url:'Home.js',
            _parent:win,
            nav:win.nav,
            rootWindow:win.rootWindow
          });
          win.open(home);
      }
      else
      {
          alert("Username/Password are required");
      }
  });
  
  
  win.open();
  
  //-----------------------------------------------
  //Home.js
  
  var win = Titanium.UI.currentWindow;
  
  win.title = "Home Screen";
  var username = Titanium.UI.createTextField({
      color:'#336699',
      top:10,
      left:50,
      width:300,
      height:40,
      hintText:'Username',
      keyboardType:Titanium.UI.KEYBOARD_DEFAULT,
      returnKeyType:Titanium.UI.RETURNKEY_DEFAULT,
      borderStyle:Titanium.UI.INPUT_BORDERSTYLE_ROUNDED
  });
  win.add(username);
  </code></pre>