【InDesign】DocumentからスタートしてDocumentまで戻る【DOM散歩】 ref: http://qiita.com/cu39/items/3f8b857f2d03c7e6163e

dom_walkaround.jsx

var doc = app.activeDocument;$.writeln( doc ===
  app.activeDocument      // Document
    .stories              //  Stories
    .item(0)              //   Story
    .paragraphs           //    Paragraphs
    .item(0)              //     Paragraph
    .parentTextFrames[0]  //    TextFrame (item() does not exist)
    .parent               //   Page
    .parent               //  Spread
    .parent               // Document
  ? true : false
);

$.writeln( doc ===
  app.activeDocument  // Document
    .spreads          //  Spreads (or goto .pages)
    .item(0)          //   Spread
    .pages            //    Pages
    .item(0)          //     Page
    .textFrames       //      TextFrames
    .item(0)          //       TextFrame
    .paragraphs       //        Paragraphs
    .item(0)          //         Paragraph
    .parentStory      //        Story
    .parent           //       Document
  ? true : false
);

file0.txt

var doc = app.activeDocument;

$.writeln( doc ===
  app.activeDocument      // Document
    .stories              //  Stories
    .item(0)              //   Story
    .paragraphs           //    Paragraphs
    .item(0)              //     Paragraph
    .parentTextFrames[0]  //    TextFrame (itemメソッドは無い)
    .parent               //   Page
    .parent               //  Spread
    .parent               // Document
  ? true : false
);

$.writeln( doc ===
  app.activeDocument  // Document
    .spreads          //  Spreads (Document.pagesも可)
    .item(0)          //   Spread
    .pages            //    Pages
    .item(0)          //     Page
    .textFrames       //      TextFrames
    .item(0)          //       TextFrame
    .paragraphs       //        Paragraphs
    .item(0)          //         Paragraph
    .parentStory      //        Story
    .parent           //       Document
  ? true : false
);