$query = new CGI;
print $query->header;
$JSCRIPT=<<END;
// Ask a silly question
function riddle_me_this() {
   var r = prompt("What walks on four legs in the morning, " +
                 "two legs in the afternoon, " +
                 "and three legs in the evening?");
    response(r);
}
// Get a silly answer
function response(answer) {
   if (answer == "man")
      alert("Right you are!");
    else
      alert("Wrong!  Guess again.");
}
END
print $query->start_html(-title=>'The Riddle of the Sphinx',
                          -script=>$JSCRIPT);