Is it possible to implement a Firebug-like "inspect element" DOM element highlighter with client-side JavaScript?

Is it possible to show an arbitrary web page (call it the target web page) in an iframe element of a host webpage, and let the use select and highlight a div box in the target web page (in the iframe) and return information about that selection (开发者_开发知识库e.g. the xpath to that node) to the host web page?

This is essentially Firebug's inspect-element feature, but implemented with javascript and using an iframe to hold the webpage that is being inspected.

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You should check out firebug lite, as this may be exactly what you're looking for

Edit: just to clarify, I'm not talking about using Firebug Lite as an extension, but as in included js, as is mentioned near the bottom of the page I referenced. Like this:

<script type="text/javascript" src="https://getfirebug.com/firebug-lite.js"></script>