How to create hyperlink that appears only if the target file is present?

I need to create a static HTML file that runs only on the local client PC.

On the page (say PageA.htm), I would like for a hypelink to another page
(Page B) to appear ONLY if the target file the hyperlink references is
present (PageB.htm).

So If I'm viewing page A, and Page B is present, then I want a hyperlink to
show up on Page A to navigate to Page B.

If Page B is not present, then no hypelink would appear for Page B.

Can someone post some code that does this?