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diff --git a/misc/openlayers/lib/OpenLayers/Control/Attribution.js b/misc/openlayers/lib/OpenLayers/Control/Attribution.js
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+++ b/misc/openlayers/lib/OpenLayers/Control/Attribution.js
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+/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
+ * full list of contributors). Published under the 2-clause BSD license.
+ * See license.txt in the OpenLayers distribution or repository for the
+ * full text of the license. */
+
+/**
+ * @requires OpenLayers/Control.js
+ */
+
+/**
+ * Class: OpenLayers.Control.Attribution
+ * The attribution control adds attribution from layers to the map display. 
+ * It uses 'attribution' property of each layer.
+ *
+ * Inherits from:
+ *  - <OpenLayers.Control>
+ */
+OpenLayers.Control.Attribution = 
+  OpenLayers.Class(OpenLayers.Control, {
+    
+    /**
+     * APIProperty: separator
+     * {String} String used to separate layers.
+     */
+    separator: ", ",
+    
+    /**
+     * APIProperty: template
+     * {String} Template for the attribution. This has to include the substring
+     *     "${layers}", which will be replaced by the layer specific
+     *     attributions, separated by <separator>. The default is "${layers}".
+     */
+    template: "${layers}",
+    
+    /**
+     * Constructor: OpenLayers.Control.Attribution 
+     * 
+     * Parameters:
+     * options - {Object} Options for control.
+     */
+
+    /** 
+     * Method: destroy
+     * Destroy control.
+     */
+    destroy: function() {
+        this.map.events.un({
+            "removelayer": this.updateAttribution,
+            "addlayer": this.updateAttribution,
+            "changelayer": this.updateAttribution,
+            "changebaselayer": this.updateAttribution,
+            scope: this
+        });
+        
+        OpenLayers.Control.prototype.destroy.apply(this, arguments);
+    },    
+    
+    /**
+     * Method: draw
+     * Initialize control.
+     * 
+     * Returns: 
+     * {DOMElement} A reference to the DIV DOMElement containing the control
+     */    
+    draw: function() {
+        OpenLayers.Control.prototype.draw.apply(this, arguments);
+        
+        this.map.events.on({
+            'changebaselayer': this.updateAttribution,
+            'changelayer': this.updateAttribution,
+            'addlayer': this.updateAttribution,
+            'removelayer': this.updateAttribution,
+            scope: this
+        });
+        this.updateAttribution();
+        
+        return this.div;    
+    },
+
+    /**
+     * Method: updateAttribution
+     * Update attribution string.
+     */
+    updateAttribution: function() {
+        var attributions = [];
+        if (this.map && this.map.layers) {
+            for(var i=0, len=this.map.layers.length; i<len; i++) {
+                var layer = this.map.layers[i];
+                if (layer.attribution && layer.getVisibility()) {
+                    // add attribution only if attribution text is unique
+                    if (OpenLayers.Util.indexOf(
+                                    attributions, layer.attribution) === -1) {
+                        attributions.push( layer.attribution );
+                    }
+                }
+            } 
+            this.div.innerHTML = OpenLayers.String.format(this.template, {
+                layers: attributions.join(this.separator)
+            });
+        }
+    },
+
+    CLASS_NAME: "OpenLayers.Control.Attribution"
+});