setBatchMode(true);
  a=getTitle();
  run("RGB Color");
  div=nSlices;
  for(i=0;i<div;i++){
     selectWindow(a);
     setSlice(i+1);
     run("Duplicate...", "title=_b");
     run("HSB Stack");
     setSlice(1);
     run("Set...", "value="+((256/div)*i)+" slice");
     setSlice(2);
     run("Set...", "value=255 slice");
     run("RGB Color");
     imageCalculator("Copy", a ,"_b");
     selectWindow("_b");
     close();
  }
  setBatchMode(false);