\documentclass{article}

\usepackage{amsmath}

\usepackage[nodirectory,navibar,designiii,pdftex]{web}
%\usepackage[margin=10pt]{geometry}

\usepackage{color}
\usepackage[pdftex]{eforms}
\usepackage[pdftex]{exerquiz}
\usepackage[ImplMulti]{dljslib}

\usepackage{eso-pic}
\definecolor{mycolor}{rgb}{0.4,0.4,1}
\AddToShipoutPicture{\hbox to \paperwidth{\hss\color{mycolor}\vrule width 1.5em height\paperheight}}%

\navibarTextColor{black}
\navibarBgColor{mycolor}

\makeatletter
\@newNaviIconMenu{\web@FirstPage}{34pt}{8pt}
    {$\scriptstyle\blacktriangleleft\blacktriangleleft$}{FirstPage}
\@newNaviIconMenu{\web@LastPage}{34pt}{8pt}
    {$\scriptstyle\blacktriangleright\blacktriangleright$}{LastPage}
\@newNaviIconMenu{\web@PrevPage}{34pt}{8pt}
    {$\scriptstyle\blacktriangleleft$}{PrevPage}
\@newNaviIconMenu{\web@NextPage}{34pt}{8pt}
    {$\scriptstyle\blacktriangleright$}{NextPage}

\renewcommand\web@navigationbar{%
\hfill\bfseries\footnotesize
\web@FirstPage\
\web@LastPage\
\web@PrevPage\
\web@NextPage\
}

\def\answers@@q[#1]#2%
{%
    \gdef\numCols{#2}%
    \edef\eqtmp{\aPointType}\xdef\aPointType{\eqtmp,[\eqPTs,"mc"]}%
        \ifx\q@hwdest\@empty
            \xdef\@qzsolndest{#1}%
        \else
            \gdef\@qzsolndest{\q@hwdest}%
        \fi
        \answers@q@tabular{#2}%
}

\makeatother

\let\rmdefault\sfdefault

\DeclareMathOperator{\sgn}{sgn}
\DeclareMathOperator{\tg}{tan}
\DeclareMathOperator{\asin}{asin}
\DeclareMathOperator{\cotg}{cotg}
\DeclareMathOperator{\arctg}{atan}
\DeclareMathOperator{\atan}{atan}
\DeclareMathOperator{\arccotg}{arccotg}


\hypersetup{pdfmenubar=true, pdftoolbar=true}

\useBeginQuizButton
\useEndQuizButton
\def\AnswerFieldDefaults
{%
   \BC{}\S{N}\Ff{\FfReadOnly}
 }

\everymath{\displaystyle}


\makeatletter

\renewcommand\web@navigationbar{%
Answer: \AnswerField[\rectW{7cm}\textSize{0}]\currQuiz
\hfill\bfseries\footnotesize
\insertwebtoc
\web@FirstPage\
\web@LastPage\
\web@PrevPage\
\web@NextPage\
}

\makeatother


\def\problem#1{\bigskip\item $y={}$#1; \qquad $y'={}$}
\def\interval#1{\saveinterval#1}
\def\saveinterval[#1,#2]{\def\a{#1} \def\b{#1}}
\def\correctanswer#1{\RespBoxMath{#1}{5}{.0001}{[\a,\b]}\CorrAnsButton{#1}}


\begin{document}


\def\CorrAnsButtonDefaults
{%
  \CA{?}\W{1}\S{B}
  \BC{0 0 0}\BG{.7529 .7529 .7529}\H{P}
  \TU{Click to see the correct answer.}
}

\author{Robert Ma\v r\'\i k}
\title{\hbox{Demo 2 -- Derivatives}}
\def\optionalpagematter{
  \begin{itemize}
  \item Find the derivatives of  elementary functions.
  \item Click "Begin quizz", fill your answers and click "End quizz". The number of correct answers appears in the field.
  \item Click "Correct" and you get the fields with question marks to
    find the correct answers.
  \item Test starts on the next page.
  \end{itemize}
}
\maketitle

\quiztype{f}

\begin{quiz}{derivace}
Differentiate
\begin{questions}