anchor.diff:      markdownEN.onchange = onchangeEN;
       markdownEN.onkeyup = onchangeEN;
       markdownEN.onfocusout = onleaveEN;
  +    coll = document.getElementById("collection");
  +    coll.onchange = onchangeCollection;
  +    coll.onkeyup = onchangeCollection;
  +    onchangeCollection();
   
       function onleaveEN() {
         var mdEN = document.getElementById("markdownEN").value;
  
positive.code:          previewEN.style.backgroundColor="";
          }
        }
  
        var myclick = function (id) {
          image = document.getElementById(id);
  
negative.code:           .col-md-1
              | Collection <br>
            .col-md-10
              textarea.form-control(id="collection" name="collection" rows=7) #{article.collection}
          .row
            .col-md-1
              
            .col-md-10
              
                .div(id="linkArea")
                  
          .row 
            .col-md-1
            .col-md-5
  