Determine page item type from xmlelement

I have a page item (text frame or text on path) that has been tagged (say tag named pp).

I need to determine if it is a text frame or text path using the xmlelement.

Can anyone guide how to do this?

I tried the following:

var items = doc.xmlElements[0].evaluateXPathExpression("//pp");

var story = items[0].parent.parentStory;

story.pageItems.item(0).allPageItems.item(0).constuctor.name // this should be textframe or textpath

But could not succed.

Kindly help!