Capturing the URL to a PDF page, without downloading the page?

While viewing a certain home page using Netscape 7.2 in Mac OS X, I see 
a highlighted (i.e., underlined and colored) link to what I know is 
actually a PDF web page or file.

How can I (quickly, reliably) capture the *complete* URL for that PDF 
file page, without starting a download of the PDF file itself?

(If I download and save the home page itself as a text or HTML file, it 
only contains the relative href, not the complete link, for the PDF 
file, since the PDF file is within the same directory as the home page.  
I guess I could assemble the complete URL from that data, but is there a 
simpler way?)