Back reference

Dear Sirs,

Do you know how can I reference a back html address.

I am getting more specific. I write an html file. I
want to create a link to the file that called this
html file I write. The URL that calls my html file
is not always the same. Is there any way to reference
the caller of my html file. Is there any variable that
the browser can understand.

Thank you in advance
---
Panayotis G. Matsinopoulos
70 Megistis strt.
GR-11364 Athens
Greece
e-mail:Panos.Matsinopoulos@mailcity.com
tel:+30 1 8641922 (with answering machine)

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