Made a couple of minor performance tweeks to navtree.js

src/navtree.js

+var SYNCONMSG = 'click to disable panel synchronisation';
+var SYNCOFFMSG = 'click to enable panel synchronisation';
 var navTreeSubIndices = new Array();
 
 function getData(varName)
@@ -78,12 +80,12 @@ function createIndent(o,domNode,node,level)
   var level=-1;
   var n = node;
   while (n.parentNode) { level++; n=n.parentNode; }
-  var imgNode = document.createElement("img");
-  imgNode.style.paddingLeft=(16*level).toString()+'px';
-  imgNode.width  = 16;
-  imgNode.height = 22;
-  imgNode.border = 0;
   if (node.childrenData) {
+    var imgNode = document.createElement("img");
+    imgNode.style.paddingLeft=(16*level).toString()+'px';
+    imgNode.width  = 16;
+    imgNode.height = 22;
+    imgNode.border = 0;
     node.plus_img = imgNode;
     node.expandToggle = document.createElement("a");
     node.expandToggle.href = "javascript:void(0)";
@@ -100,8 +102,12 @@ function createIndent(o,domNode,node,level)
     domNode.appendChild(node.expandToggle);
     imgNode.src = node.relpath+"ftv2pnode.png";
   } else {
-    imgNode.src = node.relpath+"ftv2node.png";
-    domNode.appendChild(imgNode);
+    var span = document.createElement("span");
+    span.style.display = 'inline-block';
+    span.style.width   = 16*(level+1)+'px';
+    span.style.height  = '22px';
+    span.innerHTML = ' ';
+    domNode.appendChild(span);
   } 
 }
 
@@ -320,7 +326,7 @@ function showNode(o, node, index, hash)
       if (!node.childrenVisited) {
         getNode(o, node);
       }
-      $(node.getChildrenUL()).show();
+      $(node.getChildrenUL()).css({'display':'block'});
       if (node.isLast) {
         node.plus_img.src = node.relpath+"ftv2mlastnode.png";
       } else {
@@ -352,8 +358,22 @@ function showNode(o, node, index, hash)
   }
 }
 
+function removeToInsertLater(element) {
+  var parentNode = element.parentNode;
+  var nextSibling = element.nextSibling;
+  parentNode.removeChild(element);
+  return function() {
+    if (nextSibling) {
+      parentNode.insertBefore(element, nextSibling);
+    } else {
+      parentNode.appendChild(element);
+    }
+  };
+}
+
 function getNode(o, po)
 {
+  var insertFunction = removeToInsertLater(po.li);
   po.childrenVisited = true;
   var l = po.childrenData.length-1;
   for (var i in po.childrenData) {
@@ -361,6 +381,7 @@ function getNode(o, po)
     po.children[i] = newNode(o, po, nodeData[0], nodeData[1], nodeData[2],
       i==l);
   }
+  insertFunction();
 }
 
 function gotoNode(o,subIndex,root,hash,relpath)
@@ -466,6 +487,7 @@ function initNavTree(toroot,relpath)
 
   $(window).load(function(){
     navTo(o,toroot,window.location.hash,relpath);
+    showRoot();
   });
 
   $(window).bind('hashchange', function(){
@@ -489,7 +511,5 @@ function initNavTree(toroot,relpath)
        navTo(o,toroot,window.location.hash,relpath);
      }
   })
-
-  $(window).load(showRoot);
 }
 

src/navtree_js.h

+"var SYNCONMSG = 'click to disable panel synchronisation';\n"
+"var SYNCOFFMSG = 'click to enable panel synchronisation';\n"
 "var navTreeSubIndices = new Array();\n"
 "\n"
 "function getData(varName)\n"
@@ -78,12 +80,12 @@
 "  var level=-1;\n"
 "  var n = node;\n"
 "  while (n.parentNode) { level++; n=n.parentNode; }\n"
-"  var imgNode = document.createElement(\"img\");\n"
-"  imgNode.style.paddingLeft=(16*level).toString()+'px';\n"
-"  imgNode.width  = 16;\n"
-"  imgNode.height = 22;\n"
-"  imgNode.border = 0;\n"
 "  if (node.childrenData) {\n"
+"    var imgNode = document.createElement(\"img\");\n"
+"    imgNode.style.paddingLeft=(16*level).toString()+'px';\n"
+"    imgNode.width  = 16;\n"
+"    imgNode.height = 22;\n"
+"    imgNode.border = 0;\n"
 "    node.plus_img = imgNode;\n"
 "    node.expandToggle = document.createElement(\"a\");\n"
 "    node.expandToggle.href = \"javascript:void(0)\";\n"
@@ -100,8 +102,12 @@
 "    domNode.appendChild(node.expandToggle);\n"
 "    imgNode.src = node.relpath+\"ftv2pnode.png\";\n"
 "  } else {\n"
-"    imgNode.src = node.relpath+\"ftv2node.png\";\n"
-"    domNode.appendChild(imgNode);\n"
+"    var span = document.createElement(\"span\");\n"
+"    span.style.display = 'inline-block';\n"
+"    span.style.width   = 16*(level+1)+'px';\n"
+"    span.style.height  = '22px';\n"
+"    span.innerHTML = ' ';\n"
+"    domNode.appendChild(span);\n"
 "  } \n"
 "}\n"
 "\n"
@@ -320,7 +326,7 @@
 "      if (!node.childrenVisited) {\n"
 "        getNode(o, node);\n"
 "      }\n"
-"      $(node.getChildrenUL()).show();\n"
+"      $(node.getChildrenUL()).css({'display':'block'});\n"
 "      if (node.isLast) {\n"
 "        node.plus_img.src = node.relpath+\"ftv2mlastnode.png\";\n"
 "      } else {\n"
@@ -352,8 +358,22 @@
 "  }\n"
 "}\n"
 "\n"
+"function removeToInsertLater(element) {\n"
+"  var parentNode = element.parentNode;\n"
+"  var nextSibling = element.nextSibling;\n"
+"  parentNode.removeChild(element);\n"
+"  return function() {\n"
+"    if (nextSibling) {\n"
+"      parentNode.insertBefore(element, nextSibling);\n"
+"    } else {\n"
+"      parentNode.appendChild(element);\n"
+"    }\n"
+"  };\n"
+"}\n"
+"\n"
 "function getNode(o, po)\n"
 "{\n"
+"  var insertFunction = removeToInsertLater(po.li);\n"
 "  po.childrenVisited = true;\n"
 "  var l = po.childrenData.length-1;\n"
 "  for (var i in po.childrenData) {\n"
@@ -361,6 +381,7 @@
 "    po.children[i] = newNode(o, po, nodeData[0], nodeData[1], nodeData[2],\n"
 "      i==l);\n"
 "  }\n"
+"  insertFunction();\n"
 "}\n"
 "\n"
 "function gotoNode(o,subIndex,root,hash,relpath)\n"
@@ -466,6 +487,7 @@
 "\n"
 "  $(window).load(function(){\n"
 "    navTo(o,toroot,window.location.hash,relpath);\n"
+"    showRoot();\n"
 "  });\n"
 "\n"
 "  $(window).bind('hashchange', function(){\n"
@@ -489,7 +511,5 @@
 "       navTo(o,toroot,window.location.hash,relpath);\n"
 "     }\n"
 "  })\n"
-"\n"
-"  $(window).load(showRoot);\n"
 "}\n"
 "\n"