Changing layer order

i know of the swapdepth AS, but then how do I get the depth to change for two objects…in this circumstance, there are 4 buttons…the one that gets clicked should come to the very top, the curtain is next, and the rest of the buttons behind*

i have a theatre type stage with objects on it…when user clicks on the object, i want it to come forward, have the curtains close and only have that object be visible now with a closed curtain…

the question here then is:

how do i change layer orders so that when a certain object is clicked, that objects layer goes above the curtain layer while the rest of the object remain behind the layer, so that when the curtain closes, only the selected object remains ahead of the curtain (the rest behind)?

any help would be appreciated…thanks!