anchor.diff:              location.href = "<%=request.getRequestURI()%>?heatmap=nodesByCategory&category=" + nodes[0].id;
               <%
                 }
  -              
  +
                 if ("nodesByCategory".equals(heatmap) || "nodesByForeignSource".equals(heatmap)) {
               %>
  -            location.href = "/opennms/element/node.jsp?node="+nodes[0].nodeId
  +            location.href = "/opennms/element/node.jsp?node=" + nodes[0].nodeId
               <%
                 }
               %>
  
positive.code:         });
      </script>
  </div>
  [<a href="<%=request.getRequestURI()%>?heatmap=foreignSources">foreingSources</a>] &nbsp; [<a href="<%=request.getRequestURI()%>?heatmap=categories">categories</a>]
  
negative.code: 
            if (request.getParameterMap().containsKey("heatmap")) {
              heatmap = request.getParameter("heatmap");
            }
  
            url += heatmap + "/";
  
            if ("nodesByForeignSource".equals(heatmap)) {
              foreignSource = request.getParameter("foreignSource");
  