object.AtEndOfStream

function GetALine(filespec)
{
   var fso, f, s, ForReading;
   ForReading = 1, s = "";
   fso = new ActiveXObject("Scripting.FileSystemObject");
   f = fso.OpenTextFile(filespec, ForReading, false);
   while (!f.AtEndOfStream)
      s += f.ReadLine( );
   f.Close( );
   return(s);
}

Function ReadEntireFile(filespec)
   Const ForReading = 1
   Dim fso, theFile, retstring
   Set fso = CreateObject("Scripting.FileSystemObject")
   Set theFile = fso.OpenTextFile(filespec, ForReading, False)
   Do While theFile.AtEndOfStream <> True
      retstring = theFile.ReadLine
   Loop
   theFile.Close
   ReadEntireFile = retstring
End Function