Add drop down to certain boards and not others.

[SpawnedX]

I would like to add a drop down box to some of my boards. In this drop down box it would be a list of my prefixes for that board and when they click on one of the prefixes in the drop down it will sort that board by the prefixes.

I know I will have to have the forumdisplay template check the board ID and if is one of the board IDs I want the box on then display it. Could someone show me what the if statement would look like for checking the board ID? I can figure out the drop down menu part for myself.

Also on a related note, is there a way to add a tabid onto the address a board link opens?