thank you again very much... just to complete
is the following code the consequent only solution or there is a more elegant way to address it?

Code:
        refs: {
            info1: '#infoview1',
            info2: '#infoview2'
        },
        control: {
            'info1': {
                activate: 'fillData'
            },
            'info2': {
                activate: 'fillData2'
            }
        }
...

Code:
    fillData2: function() {
        this.fillData(2);
    },


    fillData: function(level) {
        var store = Ext.getStore('infostore');
        switch (level) {
            case 1:
            default:
                var panel = this.getInfo1();
                break;
            case 2:
                var panel = this.getInfo2();
                break;
        }

        store.load({
....
Alessandro