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+% \subsubsection{JavaScript}
+
+% \DescribeEnv{javascript}{Code inside a javascript environment is printed on paper, but executed on the web.}
+
+% \begin{macrocode}
+%<*classXimera>
+\DefineVerbatimEnvironment{javascript}{Verbatim}{numbers=left,frame=lines,label=JavaScript,labelposition=topline}
+%</classXimera>
+% \end{macrocode}
+
+% \begin{macrocode}
+%<*htXimera>
+% for programming javascript
+\renewenvironment{javascript}{\NoFonts}{\EndNoFonts}
+\ScriptEnv{javascript}{\stepcounter{identification}\ifvmode \IgnorePar\fi \EndP\HCode{<div class="javascript" id="javascript\arabic{identification}"><script type="text/javascript">}\HtmlParOff}{\HtmlParOn\HCode{</script></div>}}
+%</htXimera>
+% \end{macrocode}
+
+% \DescribeMacro{\js}{Code inside a |\js| macro is evaluated and replaced with its value.}
+% \begin{macrocode}
+%<*classXimera>
+\def\js#1{\mbox{\texttt{\detokenize{#1}}}}
+%</classXimera>
+% \end{macrocode}
+
+% \begin{macrocode}
+%<*htXimera>
+\def\js#1{\stepcounter{identification}\HCode{<span class="inline-javascript" id="javascript\arabic{identification}"><script type="text/javascript"> function javascript\arabic{identification}() }\{\HCode{ return \detokenize{#1}; }\}\HCode{</script></span>}}
+%</htXimera>
+% \end{macrocode}
+