A little backround into the mission: My sitemap is a tree menu, i need to navigate from a page to the tree menu, but in the tree menu, the page that the visitor came from needs to be highlighted.

Here is my code for the tree menu : tree_nodes.js

// Tree structure definition
var TREE_NODES = [
["Module1: Use of Firearms", null, null,
["General Safety and Req of Firearms Control", "#sectionName", null,
["Learning Outcome", null, null],
["Introduction", null, null],
["Safety Considerations", null, null],
["Summary", null, null]],
["Fundamentals of Shooting", "other.html", null,
["Learning Outcome", null, null],
["Introduction", null, null],
["Body Position", null, null,
["The Interview Position", null, null],
["The Ready Position", null, null],
["Kneeling Position", null, null],
["The Prone Position", null, null]],
["Firm Controlled Grip", null, null],
["Correct Sight Picture", null, null],
["Trigger Squeeze", null, null],
["Controlled Relaxed Breathing", null, null],
["Correct Technique for Follow-Through", null, null],
["Fault Identification on the Shooting Range", null, null],
["Psychological Preparation", null, null],
["Summary", null, null]],
["Z88 / Pietro Beretta Pistol", "../other_folder/file.html", null,
["Learning Outcome", null, null],
["Introduction", null, null],
["Names of Visible Parts (External)", null, null],
["Making Safe Procedures", null, null],
["Description", null, null],
["Characteristics", null, null],
["Stripping and Assembling", null, null],
["Names of Internal Parts", null, null],
["Mechanism", null, null],
["Different Carry Conditions", null, null],
["Stoppages (Malfunction)", null, null],
["Immediate Reaction Drill", null, null],
["Cleaning & Maintenance", null, null],
["Magazine Filling", null, null],
["Shooting Range Commands", null, null],
["Summary", null, null]],
["Republic Arm Pistol ", "../other_folder2/file.html", null,
["Learning Outcome", null, null],
["Introduction", null, null],
["Visible Parts", null, null],
["Making Safe Procedure", null, null],
["Description", null, null],
["Characteristics", null, null],
["Stripping", null, null],
["Assembling", null, null],
["Names of Internal Parts", null, null],
["Understanding the Mechanism of the RAP 401", null, null],
["Different Carry Conditions", null, null],
["Maintenance", null, null],
["Magazine Filling", null, null],
["Loading and Unloading", null, null],
["Identification of Stoppages/Malfunctions", null, null],
["Immediate Reaction Drills", null, null],
["Shooting Range Commands", null, null],
["Summary", null, null]],
["R5 Assault Rifle ", "../other_folder2/file.html", null,
["Learning Outcome", null, null],
["Introduction", null, null],
["Visible Parts", null, null],
["Making Safe Procedure", null, null],
["Description", null, null],
["Characteristics", null, null],
["Stripping and Assembling", null, null],
["Names of Internal Parts", null, null],
["Mechanism", null, null],
["Different Carry Conditions", null, null],
["Maintenance", null, null],
["Magazine Filling", null, null],
["Loading and Unloading of the R5", null, null],
["Identifying Stoppages", null, null],
["Rectification of Malfunctions/Misfires", null, null],
["Shooting Range Drills", null, null],
["Summary", null, null]],
["Musler 12 Gauge Shotgun ", "../other_folder2/file.html", null,
["Learning Outcome", null, null],
["Introduction", null, null],
["Visible Parts", null, null],
["Making Safe Procedure", null, null],
["Description and Characteristics", null, null],
["Stripping and Assembling the Musler", null, null],
["Maintaining the Musler", null, null],
["Names of Parts", null, null],
["Mechanism", null, null],
["Different Carry Conditions", null, null],
["Magazine Filling", null, null],
["Identification of Stoppages", null, null],
["Rectification of Stoppages", null, null],
["Shooting Range Commands", null, null],
["Summary", null, null]],
["Tactical Shooting Techniques ", "../other_folder2/file.html", null,
["Learning Outcome", null, null],
["Introduction", null, null],

["Draw and Fire in Condition 2", null, null],
["Single-Hand Firing", null, null],
["Magazine Change", null, null],
["Draw/Turn and Fire in Different Directions", null, null],
["Instinctive Shooting", null, null],
["Shoot in a Ready Position", null, null],
["Shoot from Behind Cover", null, null],
["Technique to Shoot During Low Light Situations", null, null],
["Summary", null, null]],
],
["Module2: Legal Principles", null, null,
["Private Defence", "#sectionName", null],
["Use of Force in Arrest", "other.html", null],
["Section 49 - Use of Deadly Force", "../other_folder/file.html", null],
["Police Directives - Use of Firearms", "../other_folder2/file.html", null],
["Requirements of Firearms Control Act 2000", "../other_folder2/file.html", null]
],
["Module3: Obstacle Shooting Course", null, null,
["Introduction", "#sectionName", null],
["Activities and Assessment", "other.html", null]
],
["Module4: Simulated Exercises", null, null,
["Introduction", "#sectionName", null],
["Simulation Excercise", "other.html", null]
]
];



Here is my code for the tree menu : tree_format.js

// Tree format definition
var TREE_FORMAT = [
// 0. left position
10,
// 1. top position
10,
// 2. show buttons ("+" and "-" images)
true,
// 3. button images: collapsed state, expanded state, blank image
["graphics/collapsed_button.gif", "graphics/expanded_button.gif", "graphics/blank.gif"],
// 4. size of buttons: width, height, indent amount for childless nodes
[16, 16, 16],
// 5. show icons ("folder" and "document")
true,
// 6. icon images: closed folder, opened folder, document
["graphics/closed_folder.gif", "graphics/opened_folder.gif", "graphics/document.gif"],
// 7. size of icons: width, height
[16, 16],
// 8. indent amount for each level of the tree
[0, 16, 32, 48, 64, 80, 96, 112, 128],
// 9. background color for the tree
"",
// 10. default CSS class for nodes
"treeNode",
// 11. individual CSS classes for levels of the tree
[],
// 12. "single branch" mode
false,
// 13. padding and spacing values for all nodes
[0, 0]
];

Note: Nothing is linked as yet