How to put a scroll inside my tabs content?

Here is my code:

{
    function myScript(thisObj){
        function myScript_buildUI(thisObj){
            var myPanel = (thisObj instanceof Panel) ? thisObj : new Window("palette","Panel Estudio Voraz",undefined,{resizable:true});
            myPanel.layout.resize();
res = "group{orientation:'column',margins: 0, spacing: 0,\
                      alignment: ['fill', 'fill'], alignChildren: ['fill', 'top'],\
                          myTabbedPanel: Panel{type:'tabbedpanel',\
                                myTab1: Panel{type:'tab', text:'Salidas',margins: [4,8,4,8], spacing: 5, alignChildren: ['fill', 'center'],\
                                 },\
               myTab2: Panel{type:'tab', text:'Plecas',\
                  imageWIP: IconButton{text:'WIP',alignment:['top','top'], preferredSize:[372,180]},\
               },\
               myTab3: Panel{type:'tab', text:'Stings',\
                  imageWIP: IconButton{text:'WIP',alignment:['top','top'], preferredSize:[372,180]},\
               },\
               myTab4: Panel{type:'tab', text:'Menus',\
                  imageWIP: IconButton{text:'WIP',alignment:['top','top'], preferredSize:[372,180]},\
               },\
               myTab5: Panel{type:'tab', text:'Wipers',\
                 imageWIP: IconButton{text:'WIP',alignment:['top','top'], preferredSize:[380,180]},\
               },\
           },\
}";   
            myPanel.grp = myPanel.add(res);
            myPanel.grp.spacing= 0
 myPanel.grp.myTabbedPanel.onChange = function(){  
    var selectedTab = this.selection;  
    alert(selectedTab.text);    //Alerts the name of the tab that was clicked  
    alert(selectedTab.reflect.properties);//Alerts the property options available for your tab object  
    switch(selectedTab.selection.text){
          case "Salidas":     //If Salidas was clicked... 
                
                    myPanel.grp.myTabbedPanel.myTab1.ddPanel.selection = 0
                
              break; 
          case "Plecas":     //If Plecas was clicked... 
                     myPanel.grp.myTabbedPanel.myTab1.ddPanel.selection = 0
                    
              break; 
          //and so on for the other tabs you have. 
          default:
          break;
              }
}  
//END PANEL    --------------------------- NO PONER NADA ABAJO DE ESTA LÍNEA -------------------------------
            return myPanel;
       
        }
  
   
      
   
        var myScriptPal = myScript_buildUI(thisObj);
       
        if((myScriptPal != null) && (myScriptPal instanceof Window)){
            myScriptPal.center();
            myScriptPal.show();
    }
}
myScript(this);
}