Hi, I have a menu (kind of windows explorer), that I downloaded from http://www.codigofonte.com.br/download.asp?arquivo=124 (still cannot use live links, sorry) and on page just have to place <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <title>Menu tree</title> <link rel="StyleSheet" href="dtree.css" type="text/css" /> <script type="text/javascript" src="dtree.js"></script> </head> <body> <div class="dtree"> <script type="text/javascript"> <!-- d = new dTree('d'); d.add(0,-1,'Meu Menu tree'); d.add(1,0,'Pata 1','#'); d.add(2,0,'Documento 2','#'); d.add(3,1,'Pasta 1.1','#'); d.add(4,0,'Documento 3','#'); d.add(5,3,'Pasta 1.1.1','#'); d.add(6,5,'Documento 1.1.1.1','#'); d.add(7,0,'Documento 4','#'); d.add(8,1,'Documento 1.2','#'); d.add(9,0,'Minhas Imagens','#','Pictures I\'ve taken over the years','','','imgfolder.gif'); d.add(10,9,'Viagem para o Sul','#','Pictures of Gullfoss and Geysir'); d.add(11,9,'Carros antigos','#'); d.add(12,0,'Lixeira','#','','','','trash.gif'); d.draw(); //--> </script> </div> </body> </html> Code (markup): All working fine, the problem its that when I submit the page 2 or 3 times (and it rebuilds the menu) the select directory stop working: this.s = function(id) { cn = this.arrNodes[id]; if (this.selectedNode != id) { if (this.selectedNode) { alert("Objecto: "+this.instanceName); alert("Selected: "+this.selectedNode); eOldSpan = document.getElementById("s" + this.instanceName + this.selectedNode); alert("eOldSpan: "+eOldSpan); eOldSpan.className = "node"; } eNewSpan = document.getElementById("s" + this.instanceName + id); eNewSpan.className = "nodeSel"; this.selectedNode = id; if (this.useCookies) this.setCookie('cs' + this.instanceName, cn.id); } } Code (markup): this last alert("eOldSpan: "+eOldSpan); returns null. Even if I leave my application and enter again it continue to return error, it only solves when I close the browser, so it must be something kept on cache. Can anyone give me some help Thanks Telmo Cardoso