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var imgHeight = app.activeDocument.height;
var desc001 = new ActionDescriptor();
desc001.putUnitDouble( stringIDToTypeID( "height" ), stringIDToTypeID( "pixelsUnit" ), imgHeight );
desc001.putUnitDouble( stringIDToTypeID( "resolution" ), stringIDToTypeID( "densityUnit" ), 72.000000 );
desc001.putBoolean( stringIDToTypeID( "scaleStyles" ), true );
desc001.putBoolean( stringIDToTypeID( "constrainProportions" ), true );
desc001.putEnumerated( stringIDToTypeID( "interfaceIconFrameDimmed" ), stringIDToTypeID( "interpolationType" ), stringIDToTypeID( "automaticInterpolation" ) );
executeAction( stringIDToTypeID( "imageSize" ), desc001, DialogModes.NO );