Playing the previous animation

If I use the following to go to the next animation, how do I get the previous animation?

if (llToLower(message) == "next animation")
        { 
            mkLoungingAgentKey = agent;
            llRequestPermissions(mkLoungingAgentKey,PERMISSION_TRIGGER_ANIMATION);
        }
            if (miPermissionsAcquired == TRUE)
        {
            llStopAnimation(current);
            llStartAnimation(llGetInventoryName(INVENTORY_ANIMATION, next));
            current = llGetInventoryName(INVENTORY_ANIMATION, next);
            llWhisper(0, "Now playing: " + current);
            next++;
            if( next == limit)
        {
            next = 0;
        }

You can get a list of the currently playing animations with llGetAnimationList but it might be easier to save the animation name when you call llStartAnimation for use in the next llStopAnimation.

By the way, when you call llRequestPermissions you should call the animation functions in the run_time_permissions event, not immediately after the call to llRequestPermissions.

somefunction() [
    llRequestPermissions(id, PERMISSION  _TRIGGER_ANIMATION);
    // can't do animations yet
}
run_time_permissions(integer perm) {
    if (perm & PERMISSION_TRIGGER_ANIMATION) {
        //llStopAnimation and llStartAnimation calls go here
    }
}