How to get a score in javascript

Hi everybody,

Thanks to a user, I have got  this exemple. I used it to do a quiz. A user answers  this quiz and you will be given his score. In this exemple he must get the different languages in the good order (for instance: Russian, French, English, and Italian). So far it works, but I don't know how to do the javascript to obtain the score.

Script of the button (click_event):

for (var i = 0; i < ListBox1.length; i++)

{

    if (ListBox1.getItemState(i))

    {

        ListBox2.addItem(ListBox1.getDisplayItem(i), ListBox1.getSaveItem(i));

    }

}

for (var i = ListBox1.length; i >= 0; i--)

{

    if (ListBox1.getItemState(i))

    {

        ListBox1.deleteItem(i);

    }

}

Script of the listbox (change_event)

for (var i = 0; i < this.items.nodes.length; i++)

{

    if (xfa.event.change == this.items.nodes.item(i).value)

    {

        XFAUtil.setProperty(this, "selectedIndex", i, XFAUtil.ContentType.Integer);

        break;

    }

}

Script of the total box (?_event)

Now it's your turn!

Any help will be appreciated

Many thanks