point file filter

[Alexspringer at aol.com]

Using the mapserver cgi, I have a point file in use.  I would like to add a 
select [drop down box] that has values for a filter to be applied to one 
field in the point file dbf so that only those records with the field value 
equal to that filter display.  Does anyone have an example of the .map and 
.htm that can demonstrate how this is implemented?

Thank you.