function Div(el)
  if el.classes[1] == "warning"
  then
    -- insert element in front
    table.insert(
      el.content, 1,
      pandoc.RawBlock("latex", "\\noindent\\begin{alertbox}"))
    -- insert element at the back
    table.insert(
      el.content,
      pandoc.RawBlock("latex", "\\end{alertbox}"))

  elseif el.classes[1] == "code"
  then
    -- insert element in front
    table.insert(
      el.content, 1,
      pandoc.RawBlock("latex", "\\noindent\\begin{codebox}"))
    -- insert element at the back
    table.insert(
      el.content,
      pandoc.RawBlock("latex", "\\end{codebox}"))

  elseif el.classes[1] == "exercice"
  then
    -- insert element in front
    table.insert(
      el.content, 1,
      pandoc.RawBlock("latex", "\\noindent\\begin{exercicebox}"))
    -- insert element at the back
    table.insert(
      el.content,
      pandoc.RawBlock("latex", "\\end{exercicebox}"))

  elseif el.classes[1] == "question"
  then
    -- insert element in front
    table.insert(
      el.content, 1,
      pandoc.RawBlock("latex", "\\noindent\\begin{questionbox}"))
    -- insert element at the back
    table.insert(
      el.content,
      pandoc.RawBlock("latex", "\\end{questionbox}"))

  elseif el.classes[1] == "more"
  then
    -- insert element in front
    table.insert(
      el.content, 1,
      pandoc.RawBlock("latex", "\\begin{morebox}"))
    -- insert element at the back
    table.insert(
      el.content,
      pandoc.RawBlock("latex", "\\end{morebox}"))
  end
  return el
end