Add Pages dynamically

Hi,

I have created a form where I can choose some productareas.
When I choose one area a list of articles ist grow up in subform instances.
When I choose a second area the old subform instance list grows up with the new list of articles (no new instance list).

Now I want to open every productarea in a new page to have a better overview.

my old structure is like this:
PAGE --> LIST --> ROW (addInstance)

my new structure should look like this:
PAGE (addInstance) --> LIST --> ROW (addInstance)

I tried that code but nothing happend:
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var sSubformSOM = "PAGE";
var oSubform = xfa.resolveNode(sSubformSOM);
var sParentSOM = oSubform.parent.somExpression;
var sManagerSOM = sParentSOM + "._" + oSubform.name;
var oManager = xfa.resolveNode(sManagerSOM);
var nSubCount = oManager.count;

var oNewInstance = oManager.addInstance(1);
----------------------------------------------------------------------------

My questions now are:
- how can I add a new page dynamically ?
- how can I adress that new pages to add my row instances?