Send backwards

hi. how code in javascript send layer backwards, in layer > arrange > send backward?  it#s part of simple script has 2 layers , need arrange them new layer moves top underneath other layer.

 

i've got following, i'm after cleaner

 

// =======================================================
var id122 = charidtotypeid( "move" );
    var desc28 = new actiondescriptor();
    var id123 = charidtotypeid( "null" );
        var ref10 = new actionreference();
        var id124 = charidtotypeid( "lyr " );
        var id125 = charidtotypeid( "ordn" );
        var id126 = charidtotypeid( "trgt" );
        ref10.putenumerated( id124, id125, id126 );
    desc28.putreference( id123, ref10 );
    var id127 = charidtotypeid( "t   " );
        var ref11 = new actionreference();
        var id128 = charidtotypeid( "lyr " );
        var id129 = charidtotypeid( "ordn" );
        var id130 = charidtotypeid( "prvs" );
        ref11.putenumerated( id128, id129, id130 );
    desc28.putreference( id127, ref11 );
executeaction( id122, desc28, dialogmodes.no );

 

cheers

you create function ie:

 movelayerupordown("down"); // "up" or "down"  function movelayerupordown(direction) { switch(direction.tolowercase()){     case 'up' : direction = 'nxt '; break;     case 'down' : direction = 'prvs'; break;     default : direction = 'prvs'; break; } var desc = new actiondescriptor(); var ref = new actionreference(); ref.putenumerated(charidtotypeid('lyr '),charidtotypeid('ordn'),charidtotypeid('trgt') ); desc.putreference(charidtotypeid('null'), ref ); var ref2 = new actionreference(); ref2.putenumerated(charidtotypeid('lyr '),charidtotypeid('ordn'),charidtotypeid(direction) ); try{ desc.putreference(charidtotypeid('t   '), ref2 ); executeaction(charidtotypeid('move'), desc, dialogmodes.no ); }catch(e){} } 

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