diff --git a/www/conservancy/static/admin/js/SelectBox.js b/www/conservancy/static/admin/js/SelectBox.js
new file mode 100644
index 0000000000000000000000000000000000000000..af8de204cb0cf1efa1b11edad2e97e59825fd867
--- /dev/null
+++ b/www/conservancy/static/admin/js/SelectBox.js
@@ -0,0 +1,109 @@
+var SelectBox = {
+    cache: new Object(),
+    init: function(id) {
+        var box = document.getElementById(id);
+        var node;
+        SelectBox.cache[id] = new Array();
+        var cache = SelectBox.cache[id];
+        for (var i = 0; (node = box.options[i]); i++) {
+            cache.push({ value: node.value, text: node.text, displayed: 1 });
+        }
+    },
+    redisplay: function(id) {
+        // Repopulate HTML select box from cache
+        var box = document.getElementById(id);
+        box.options.length = 0; // clear all options
+        for (var i = 0, j = SelectBox.cache[id].length; i < j; i++) {
+            var node = SelectBox.cache[id][i];
+            if (node.displayed) {
+                box.options[box.options.length] = new Option(node.text, node.value, false, false);
+            }
+        }
+    },
+    filter: function(id, text) {
+        // Redisplay the HTML select box, displaying only the choices containing ALL
+        // the words in text. (It's an AND search.)
+        var tokens = text.toLowerCase().split(/\s+/);
+        var node, token;
+        for (var i = 0; (node = SelectBox.cache[id][i]); i++) {
+            node.displayed = 1;
+            for (var j = 0; (token = tokens[j]); j++) {
+                if (node.text.toLowerCase().indexOf(token) == -1) {
+                    node.displayed = 0;
+                }
+            }
+        }
+        SelectBox.redisplay(id);
+    },
+    delete_from_cache: function(id, value) {
+        var node, delete_index = null;
+        for (var i = 0; (node = SelectBox.cache[id][i]); i++) {
+            if (node.value == value) {
+                delete_index = i;
+                break;
+            }
+        }
+        var j = SelectBox.cache[id].length - 1;
+        for (var i = delete_index; i < j; i++) {
+            SelectBox.cache[id][i] = SelectBox.cache[id][i+1];
+        }
+        SelectBox.cache[id].length--;
+    },
+    add_to_cache: function(id, option) {
+        SelectBox.cache[id].push({ value: option.value, text: option.text, displayed: 1 });
+    },
+    cache_contains: function(id, value) {
+        // Check if an item is contained in the cache
+        var node;
+        for (var i = 0; (node = SelectBox.cache[id][i]); i++) {
+            if (node.value == value) {
+                return true;
+            }
+        }
+        return false;
+    },
+    move: function(from, to) {
+        var from_box = document.getElementById(from);
+        var to_box = document.getElementById(to);
+        var option;
+        for (var i = 0; (option = from_box.options[i]); i++) {
+            if (option.selected && SelectBox.cache_contains(from, option.value)) {
+                SelectBox.add_to_cache(to, { value: option.value, text: option.text, displayed: 1 });
+                SelectBox.delete_from_cache(from, option.value);
+            }
+        }
+        SelectBox.redisplay(from);
+        SelectBox.redisplay(to);
+    },
+    move_all: function(from, to) {
+        var from_box = document.getElementById(from);
+        var to_box = document.getElementById(to);
+        var option;
+        for (var i = 0; (option = from_box.options[i]); i++) {
+            SelectBox.add_to_cache(to, { value: option.value, text: option.text, displayed: 1 });
+            SelectBox.delete_from_cache(from, option.value);
+        }
+        SelectBox.redisplay(from);
+        SelectBox.redisplay(to);
+    },
+    sort: function(id) {
+        SelectBox.cache[id].sort( function(a, b) {
+            a = a.text.toLowerCase();
+            b = b.text.toLowerCase();
+            try {
+                if (a > b) return 1;
+                if (a < b) return -1;
+            }
+            catch (e) {
+                // silently fail on IE 'unknown' exception
+            }
+            return 0;
+        } );
+    },
+    select_all: function(id) {
+        var box = document.getElementById(id);
+        for (var i = 0; i < box.options.length; i++) {
+            box.options[i].selected = 'selected';
+        }
+    }
+}