How to know which text frame's page number in cs6?

Hello all,

I want to know page number of selected textframe. I tried different properties but unable.

Help need on this line:      alert(i + " " + myFrame.id + "   " + myFrame.parentPage.id);  // here i want page number to be displayed

#target Indesign

var myDoc = app.documents.item(0);

var i;

    for(i=0; i < myDoc.textFrames.length; i++)

{

        var myFrame = myDoc.textFrames[i];

    myFrame.select(); 

     alert(i + " " + myFrame.id + "   " + myFrame.parentPage.id);  // here i want page number to be displayed

}

thanks

virender