function mainPicup1 () {
  document.write('<ul>\
<li id="bt01"><a href="./case/industry.html">産業関係</a></li>\
<li id="bt02"><a href="./case/agriculture.html">農業関係</a></li>\
<li id="bt03"><a href="./case/construction.html">建築・建設業関係</a></li>\
<li id="bt04"><a href="./case/transport.html">運送業関係</a></li>\
<li id="bt05"><a href="./case/seat.html">シート製造業関係</a></li>\
<li id="bt06"><a href="./contact.html">お問い合わせ</a></li>\
</ul>');
}
function mainPicup2 () {
  document.write('<ul>\
<li><a href="./company.html">Read more</a></li>\
</ul>');
}