anchor.diff:      - else if (vistype == "tree")
           link(rel='stylesheet', href='/css/vis/tree.css')
           script(src = '/js/bst/lib/bst.js')
  +    - else if (vistype == 'queue')
  +        script(src = '/js/queue.js')
       - else  
           script.
               var error = !{JSON.stringify(data)}
  
positive.code:                             a(onclick="setvis('nodelink')") Node-link diagram
                          li#tree 
                              a(onclick="setvis('tree')") Tree 
                      span upload thumbnail
                      
          -}
  
negative.code:         if (vistype=="tree") {
              $("#tree").addClass("active")
          }
          else if (vistype=="queue") {
              $("#queue").addClass("active")
          }
          else $("#nodelink").addClass("active")  
      script.
          var owner = "#{owner}"
          if (owner==="false") {
  