InfoPath Dev

I have embedded a browser enabled infopath webpart that displays on multiple pages on our site. I want to collect the current url for the page when the form is submitted or when the page loads. This will allow me to collect relvant product information from that specific web page. I want to ...

I have a browser enabled infopath webpart that displays on multiple pages and i want to collect the current url when the user submits the form so i can collect important product information on that page. How do I auto-populate the url into a field on the form? Thanks in advance.. Jonathan