how can I custom tranking link in delivery

I want costom my tracking label in ACM delivery, and I see below article, but I'm not sure how can I add an extra script array of the delivery

I try to add the array ang got below pic error. how can I add the array articleList?

The solution is to:

1. Pre-load all the possible articles in an extra script array of the delivery - articleList[] - which means there must be a finite number of possible articles.

2. Write a JavaScript function at the beginning of the content.

   <%@ value object='startScript' %>
   function displayArticle(articleId)
   {
     <%@ foreach object="articleList" item="article" %>
       if( articleId == <% value object="article" xpath="@id" %> ) 
       {
         <%@ value object='endScript' %>
           <a href="http://nl.net?a.jsp?article=<%@ value object="article" xpath="@id" %>">article</a>
         <%@ value object='startScript' %>
       } 
     <%@ end @%>
   }
   <%@ value object='endScript' %>

3. Display the article by calling the function.

   <%
   for(var i=0; i<recipient.rcpArticle.length; i++ )
   {
    displayArticle(recipient.rcpArticle[i].article.@id)
   }
   %>