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www/extras/Fork/ProgressBar.css

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+.webgui-fork-pb {
+    border: thin solid black; 
+    position: relative;
+    line-height: 20pt;
+    height: 20pt;
+}
+
+.webgui-fork-pb .webgui-fork-pb-bar {
+    background-color: lime; 
+    height: 100%;
+}
+
+.webgui-fork-pb .webgui-fork-pb-caption { 
+    position: absolute; 
+    top: 0; 
+    left: 0; 
+    width: 100%;
+    text-align: center;
+    font-size: 18pt;
+}

www/extras/Fork/ProgressBar.js

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+/*global YAHOO, WebGUI, document */
+/* Dependencies: yahoo, dom */
+(function () {
+    var dom = YAHOO.util.Dom,
+    ns      = YAHOO.namespace('WebGUI.Fork'),
+    cls     = ns.ProgressBar = function () {},
+    proto   = cls.prototype;
+
+    proto.render = function (node) {
+        var bar, cap;
+        if (!node.tagName) {
+            node = document.getElementById(node);
+        }
+        dom.addClass(node, 'webgui-fork-pb');
+        bar = document.createElement('div');
+        cap = document.createElement('div');
+        dom.addClass(bar, 'webgui-fork-pb-bar');
+        dom.addClass(cap, 'webgui-fork-pb-caption');
+        node.appendChild(bar);
+        node.appendChild(cap);
+        this.domNode = node;
+        this.bar     = bar;
+        this.caption = cap;
+    };
+    proto.update = function (done, total) {
+        var pct = (total > 0 ? Math.floor((done/total)*100) : 100) + '%';
+        this.caption.innerHTML = pct;
+        this.bar.style.width = pct;
+    };
+}());

www/extras/Fork/poll.js

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+/*global YAHOO, setTimeout */
+/* Dependencies: yahoo, connection_core, json */
+
+(function () {
+    var ns = YAHOO.namespace('WebGUI.Fork'), JSON = YAHOO.lang.JSON;
+
+    ns.poll = function(args) {
+        function fetch() {
+            var first = true;
+            YAHOO.util.Connect.asyncRequest('GET', args.url, {
+                success: function (o) {
+                    var data, e;
+                    if (o.status != 200) {
+                        args.error("Server returned bad response");
+                        return;
+                    }
+                    data = JSON.parse(o.responseText);
+                    e = data.error;
+                    if (e) {
+                        args.error(e);
+                        return;
+                    }
+                    args.draw(data);
+                    if (args.first && first) {
+                        first = false;
+                        args.first();
+                    }
+                    if (data.finished) {
+                        args.finish();
+                    }
+                    else {
+                        setTimeout(fetch, args.interval || 1000);
+                    }
+                },
+                failure: function (o) {
+                    args.error("Could not communicate with server");
+                }
+            });
+        }
+        fetch();
+    };
+}());

www/extras/Fork/redirect.js

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+/*global YAHOO, setTimeout, window */
+/* Dependencies: yahoo */
+
+(function () {
+    var ns = YAHOO.namespace('WebGUI.Fork');
+    ns.redirect = function (redir, after) {
+        if (!redir) {
+            return;
+        }
+        setTimeout(function() {
+            // The idea here is to only allow local redirects
+            var loc = window.location;
+            loc.href = loc.protocol + '//' + loc.host + redir;
+        }, after || 1000);
+    };
+}());