Predefined Extents

[Sean Fadum]

Hi,

I am developing an application for the analysis of Mountain Pine Beetle infestations.  I would like to add a combo box that lets the user select a specific mapsheet and then zooms to that mapsheet (a predefined extent).  I am using PHP/Mapscript for this project.  I am new to Mapserver as well as PHP and Mapscript. 

Any ideas on the best way of going about this is?

Cheers,

Sean