--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gis_gui/lib/jquery.history.js	Fri Nov 05 18:52:55 2010 +0100
@@ -0,0 +1,74 @@
+/**
+ * jQuery history event v0.1
+ * Copyright (c) 2008 Tom Rodenberg <tarodenberg gmail com>
+ * Licensed under the GPL (http://www.gnu.org/licenses/gpl.html) license.
+ */
+(function($) {
+    var currentHash, previousNav, timer, hashTrim = /^.*#/;
+
+    var msie = {
+        iframe: null,
+        getDoc: function() {
+            return msie.iframe.contentWindow.document;
+        },
+        getHash: function() {
+            return msie.getDoc().location.hash;
+        },
+        setHash: function(hash) {
+            var d = msie.getDoc();
+            d.open();
+            d.close();
+            d.location.hash = hash;
+        }
+    };
+
+    var historycheck = function() {
+        var hash = msie.iframe ? msie.getHash() : location.hash;
+        if (hash != currentHash) {
+            currentHash = hash;
+            if (msie.iframe) {
+                location.hash = currentHash;
+            }
+            var current = $.history.getCurrent();
+            $.event.trigger('history', [current, previousNav]);
+            previousNav = current;
+        }
+    };
+
+    $.history = {
+        add: function(hash) {
+            hash = '#' + hash.replace(hashTrim, '');
+            if (currentHash != hash) {
+                var previous = $.history.getCurrent();
+                location.hash = currentHash = hash;
+                if (msie.iframe) {
+                    msie.setHash(currentHash);
+                }
+                $.event.trigger('historyadd', [$.history.getCurrent(), previous]);
+            }
+            if (!timer) {
+                timer = setInterval(historycheck, 100);
+            }
+        },
+        getCurrent: function() {
+            return currentHash.replace(hashTrim, '');
+        }
+    };
+
+    $.fn.history = function(fn) {
+        $(this).bind('history', fn);
+    };
+
+    $.fn.historyadd = function(fn) {
+        $(this).bind('historyadd', fn);
+    };
+
+    $(function() {
+        currentHash = location.hash;
+        if ($.browser.msie) {
+            msie.iframe = $('<iframe style="display:none" src="javascript:false;"></iframe>').prependTo('body')[0];
+            msie.setHash(currentHash);
+            currentHash = msie.getHash();
+        }
+    });
+})(jQuery);