anchor.diff:              | Comment <br>
             .col-md-11  
               textarea.form-control(
  -              name="comment"
  +              name="comment" id="comment"
                 rows=7) #{article.comment}
           .row
             .col-md-1
  
positive.code:       var md = document.getElementById("markdownLEFT").value;
        previewLEFT = document.getElementById("previewLEFT");
        textLeft = document.getElementById("text_left");
        
        previewLEFT.innerHTML = convert(md);
        var longLink = md.search(/\[[^\]]{40,}\]/g);
  
negative.code: 
          }
        onchangeCollection();
  
        comm = document.getElementById("comment");
        if (comm) {
          comm.onchange = onchangeComment;
          comm.onkeyup = onchangeComment;
          }
        onchangeComment();
        onchangeLEFT();
        onchangeRIGHT();
  
      }
  
      function onleaveLEFT() {
  