equivlent to javascripts location methods...

<http://www.freewebs.com/colton22/> <http://www.plaxo.com/signature> Want a signature like this? Hey, I own the website http://www.freewebs.com/colton22/ and as you may notice if you visit there, I have a counter, The counter is built in php (a pretty easy script) and I was hoping to make that script universal so it will work with more Than one page, all I have to do is link to this one php page, and it will be able to tell, ok, I am in an iframe, what is the source Of the file who created this iframe? And return that to a string that I can check later to see which file to grab on the loads, then, Write to that file that there was a new load, my problem is getting that location of the page containing the iframe where the php File is. Any suggestions? Thank you for your time, Colton22