Increase the number of sprite buy clicking over a button

hallo need following problem.
i have several sprite out of stage , need bring sprite, 1 @ time, inside stage, without  write long script this:

on mouseup me
    if sprite(5).loch = 512 then
      sprite(6).loch = 512
and on ...

i must use script several time several sprite, i'm looking solution.
is there way (more efficent)  increase 1 number of sprite every click on button?
for more information: need of button decrease number of sprite, supose if there solution of increase can arrange script.
i've tried little lingo knowlege, i'm without solution.
thanks

 

 

generally when want share information across multiple objects use global variable. keep code clean suggest using movie level functions handle bounds checking , other details might crop up.  movie script be:

 

--  movie script

global gcurspritenum, gminspritenum


on preparemovie
  gminspritenum = 10 -- use starting sprite number minus 1.
  gcurspritenum = gminspritenum
end preparemovie


on getnextsprite
  gcurspritenum = gcurspritenum + 1
 
  if gcurspritenum > _movie.lastchannel
    gcurspritenum = _movie.lastchannel
    put "getnextsprite() attempted exceed maximum available sprite channels."
  end if
 
  return sprite(gcurspritenum)
end getnextsprite


on decrementnextsprite
  gcurspritenum = gcurspritenum - 1
 
  if gcurspritenum < gminspritenum gcurspritenum = gminspritenum
end decrementnextsprite

 

 

you create 2 behavior scripts call 2 functions:

 

-- increment behavior

 

on mouseup me
  nextsp = getnextsprite()
  put nextsp
end

 

and...

 

-- decrement behavior

 

on mouseup me
  decrementnextsprite()
end

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