在div里边滚动鼠标，让div自动适应 浏览器窗口高度

请教下，怎么像百度那样，在文档阅读器上滚动鼠标，然后阅读器自动适应窗口宽度。阅读器是放在DIV里边的，自动填满divhttp://wenku.baidu.com/view/ce5d51d380eb6294dd886c4a.html
下边是我做的，阅读器在<div id="viewerPlaceHolder" 里边
<script type="text/javascript" src="/Scripts/FlexPaper/flexpaper_flash.js"></script>
<div id="viewerPlaceHolder" style="width: 660px; height: 553px; display: block; position: relative;
    left: 10px; padding-top: 15px">
    
    <script type="text/javascript">
        var fp = new FlexPaperViewer(
 '/FlexPaperViewer',
 'viewerPlaceHolder', { config: {      SwfFile: "{/LibrarySys/20130329/1/563a2d21-bfa5-4421-9994-72bc27668952/views[*,0].swf,4}",      Scale: 0.8,
     ZoomTransition: 'easeout',
     ZoomTime: 0.5,
     ZoomInterval: 0.05,
     FitPageOnLoad: false,
     FitWidthOnLoad: true,
     FullScreenAsMaxWindow: false,
     ProgressiveLoading: true,
     MinZoomSize: 0.2,
     MaxZoomSize: 5,
     SearchMatchAll: true,
     InitViewMode: 'Portrait',
     PrintPaperAsBitmap: false,
     ViewModeToolsVisible: true,
     ZoomToolsVisible: true,
     NavToolsVisible: true,
     CursorToolsVisible: true,
     SearchToolsVisible: true,
     localeChain: 'zh_CN'  }
 });
    </script>
</div>