object.DateLastModified 

function ShowFileAccessInfo(filespec)
{
   var fso, f, s;
   fso = new ActiveXObject("Scripting.FileSystemObject");
   f = fso.GetFile(filespec);
   s = filespec.toUpperCase() + "<br>";
   s += "Created: " + f.DateCreated + "<br>";
   s += "Last Accessed: " + f.DateLastAccessed + "<br>";
   s += "Last Modified: " + f.DateLastModified;
   return(s);
}

Function ShowFileAccessInfo(filespec)
   Dim fso, f, s
   Set fso = CreateObject("Scripting.FileSystemObject")
   Set f = fso.GetFile(filespec)
   s = UCase(filespec) & "<BR>"
   s = s & "Created: " & f.DateCreated & "<BR>"
   s = s & "Last Accessed: " & f.DateLastAccessed & "<BR>"
   s = s & "Last Modified: " & f.DateLastModified
   ShowFileAccessInfo = s
End Function