Help - to update script

Photo Album is simply great. I want to add something in it. But I don't know PHP.

In album, clicking anythump, take me to jpg of that photo. I want instead of directly going to jpg, if it an check if there is any html available with that name, it should show that page, if not show jpg.

Ex-

if I have three files in album folder.

abc.jpg

bbc.jpg
bbc.html


- clicking on thumb_abc.jpg should take me to abc.jpg

but clicking on thumb_bbc.jpg - it should go to bbc.html.


Please help.

With Best Regards

Sanjaymundra@hotmail.com