if (activeDocument.mode == DocumentMode.BITMAP){ 
	var id3 = charIDToTypeID( "setd" ); 
    var desc2 = new ActionDescriptor(); 
    var id4 = charIDToTypeID( "null" ); 
        var ref1 = new ActionReference(); 
        var id5 = charIDToTypeID( "Prpr" ); 
        var id6 = stringIDToTypeID( "pixelScaleFactor" ); 
        ref1.putProperty( id5, id6 ); 
        var id7 = charIDToTypeID( "Dcmn" ); 
        var id8 = charIDToTypeID( "Ordn" ); 
        var id9 = charIDToTypeID( "Trgt" ); 
        ref1.putEnumerated( id7, id8, id9 ); 
    desc2.putReference( id4, ref1 ); 
    var id10 = charIDToTypeID( "T   " ); 
        var desc3 = new ActionDescriptor(); 
        var id11 = charIDToTypeID( "Vl  " ); 
        desc3.putDouble( id11, 1.000000 ); 
        var id12 = charIDToTypeID( "Nm  " ); 
        desc3.putString( id12, "Square" ); 
    var id13 = stringIDToTypeID( "pixelScaleFactor" ); 
    desc2.putObject( id10, id13, desc3 ); 
	executeAction( id3, desc2, DialogModes.NO ); 
}