$(document).ready(function(){
  
  $("#content").wrap('<div id="wrapper1"></div>');
  $("#content").wrap('<div id="wrapper2"></div>');
  
});

function convertArea(num, obj){
  
  if (document.getElementById("test" + num + "-2").style.display == "block"){
    document.getElementById("test" + num + "-1").style.display = "block";
    document.getElementById("test" + num + "-2").style.display = "none";
    obj.value = "この部分の記法を見る";
  } else{
    document.getElementById("test" + num + "-1").style.display = "none";
    document.getElementById("test" + num + "-2").style.display = "block";
    obj.value = "この部分を元に戻す";
  }
  
}