object.ReadAll( );

function GetEverything()
{
   var fso, f;
   var ForReading = 1, ForWriting = 2;
   fso = new ActiveXObject("Scripting.FileSystemObject");
   f = fso.OpenTextFile("c:\\testfile.txt", ForWriting, true);
   f.Write("Header");
   f.Write("1234567890987654321");
   f.Close();
   f = fso.OpenTextFile("c:\\testfile.txt", ForReading);
   return(f.ReadAll());
}

Function ReadAllTextFile
   Const ForReading = 1, ForWriting = 2
   Dim fso, f
   Set fso = CreateObject("Scripting.FileSystemObject")
   Set f = fso.OpenTextFile("c:\testfile.txt", ForWriting, True)
   f.Write "Hello world!"
   Set f = fso.OpenTextFile("c:\testfile.txt", ForReading)
   ReadAllTextFile =   f.ReadAll
End Function