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This form is not intended to be printed, so we can use a non-white
background. The paper size is set to
\(5.2057\,\textrm{inches}\,\times\,3.75\,\textrm{inches}\)

The arcument
\begin{lstlisting}
onclick={doCalculation()}
\end{lstlisting}
to the ``Start'' button specifies the function to invoke when
the button is pressed.\\
\emph{Note:\/} The function is specified without semicolon here.

The \textit{doCalculation()\/} function retrieves the input
values and runs the calculation.
The result is rounded to cents and printed in a text field.

\lstinputlisting{../examples/ex0201.tex}