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// µ÷ÓÃÒ³ÃæµÄˢз½·¨
     IHTMLWindow2* pWindow;
     IHTMLDocument2*   pDocument; 
     HRESULT hr = GetDHtmlDocument(&pDocument);  
     hr = pDocument->get_parentWindow(&pWindow);  
     if( pWindow)
     {
      VARIANT ret;  
      ret.vt = VT_EMPTY;
      CString sFunc = _T("RefreshFileForClient()");
      CString sLang = _T("javascript");
      hr = pWindow->execScript(sFunc.AllocSysString(), sLang.AllocSysString(), &ret);
     }


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var fso;
fso = new ActiveXObject("Scripting.FileSystemObject");
function SystemSpecialFolder(Special)
{
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javascript stuffs

Primitive types
1. undefined, null, boolean, number, string; undefined is derived from null.
e.g. var tmp; typeof tmp == undefined.
e.g. void(javascript:aler(¡®x¡¯)) == undefined.
e.g. undefined==null
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