anchor.diff:           previewEN.style.backgroundColor="";
           }
         }
  +      function onchangeCollection() {
  +        var cl = document.getElementById("collection").value;
  +        var linkArea = document.getElementById("linkArea");
  +
  +        regexToken = /(((ftp|https?):\/\/)[\-\w@:%_\+.~#?,&\/\/=]+)|((mailto:)?[_.\w-]+@([\w][\w\-]+\.)+[a-zA-Z]{2,3})/g;
  +        var linkList;
  +       
  +        var result = "";
  +        while( (linkList = regexToken.exec(cl)) != null ) {
  +            console.log("linkList"+JSON.stringify(linkList));
  +         
  +            result += '<a href="'+linkList[0]+'"">'+linkList[0]+'</a><br>\n';
  +            console.log(result);
  +        }
  +        result = '<p>'+result+'</p>';
  +        console.log(result);
  +        linkArea.innerHTML = result;
  +      }
  +
   
         var myclick = function (id) {
           image = document.getElementById(id);
  
positive.code:     markdownEN.onchange = onchangeEN;
      markdownEN.onkeyup = onchangeEN;
      markdownEN.onfocusout = onleaveEN;
  
      function onleaveEN() {
        var mdEN = document.getElementById("markdownEN").value;
  
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
  