--- a/labs/openlayers/lib/OpenLayers/Layer/TMS.js
+++ b/labs/openlayers/lib/OpenLayers/Layer/TMS.js
@@ -1,1 +1,168 @@
+/* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for 
+ * full list of contributors). Published under the Clear BSD license.  
+ * See http://svn.openlayers.org/trunk/openlayers/license.txt for the
+ * full text of the license. */
 
+
+/**
+ * @requires OpenLayers/Layer/Grid.js
+ * @requires OpenLayers/Tile/Image.js
+ */
+
+/**
+ * Class: OpenLayers.Layer.TMS
+ * 
+ * Inherits from:
+ *  - <OpenLayers.Layer.Grid>
+ */
+OpenLayers.Layer.TMS = OpenLayers.Class(OpenLayers.Layer.Grid, {
+
+    /**
+     * APIProperty: serviceVersion
+     * {String}
+     */
+    serviceVersion: "1.0.0",
+
+    /**
+     * APIProperty: isBaseLayer
+     * {Boolean}
+     */
+    isBaseLayer: true,
+
+    /**
+     * APIProperty: tileOrigin
+     * {<OpenLayers.Pixel>}
+     */
+    tileOrigin: null,
+
+    /**
+     * APIProperty: serverResolutions
+     * {Array} A list of all resolutions available on the server.  Only set this 
+     *     property if the map resolutions differs from the server.
+     */
+    serverResolutions: null,
+
+    /**
+     * APIProperty: zoomOffset
+     * {Number} If your cache has more zoom levels than you want to provide
+     *     access to with this layer, supply a zoomOffset.  This zoom offset
+     *     is added to the current map zoom level to determine the level
+     *     for a requested tile.  For example, if you supply a zoomOffset
+     *     of 3, when the map is at the zoom 0, tiles will be requested from
+     *     level 3 of your cache.  Default is 0 (assumes cache level and map
+     *     zoom are equivalent).  Using <zoomOffset> is an alternative to
+     *     setting <serverResolutions> if you only want to expose a subset
+     *     of the server resolutions.
+     */
+    zoomOffset: 0,
+    
+    /**
+     * Constructor: OpenLayers.Layer.TMS
+     * 
+     * Parameters:
+     * name - {String}
+     * url - {String}
+     * options - {Object} Hashtable of extra options to tag onto the layer
+     */
+    initialize: function(name, url, options) {
+        var newArguments = [];
+        newArguments.push(name, url, {}, options);
+        OpenLayers.Layer.Grid.prototype.initialize.apply(this, newArguments);
+    },    
+
+    /**
+     * APIMethod:destroy
+     */
+    destroy: function() {
+        // for now, nothing special to do here. 
+        OpenLayers.Layer.Grid.prototype.destroy.apply(this, arguments);  
+    },
+
+    
+    /**
+     * APIMethod: clone
+     * 
+     * Parameters:
+     * obj - {Object}
+     * 
+     * Returns:
+     * {<OpenLayers.Layer.TMS>} An exact clone of this <OpenLayers.Layer.TMS>
+     */
+    clone: function (obj) {
+        
+        if (obj == null) {
+            obj = new OpenLayers.Layer.TMS(this.name,
+                                           this.url,
+                                           this.getOptions());
+        }
+
+        //get all additions from superclasses
+        obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);
+
+        // copy/set any non-init, non-simple values here
+
+        return obj;
+    },    
+    
+    /**
+     * Method: getURL
+     * 
+     * Parameters:
+     * bounds - {<OpenLayers.Bounds>}
+     * 
+     * Returns:
+     * {String} A string with the layer's url and parameters and also the 
+     *          passed-in bounds and appropriate tile size specified as 
+     *          parameters
+     */
+    getURL: function (bounds) {
+        bounds = this.adjustBounds(bounds);
+        var res = this.map.getResolution();
+        var x = Math.round((bounds.left - this.tileOrigin.lon) / (res * this.tileSize.w));
+        var y = Math.round((bounds.bottom - this.tileOrigin.lat) / (res * this.tileSize.h));
+        var z = this.serverResolutions != null ?
+            OpenLayers.Util.indexOf(this.serverResolutions, res) :
+            this.map.getZoom() + this.zoomOffset;
+        var path = this.serviceVersion + "/" + this.layername + "/" + z + "/" + x + "/" + y + "." + this.type; 
+        var url = this.url;
+        if (url instanceof Array) {
+            url = this.selectUrl(path, url);
+        }
+        return url + path;
+    },
+
+    /**
+     * Method: addTile
+     * addTile creates a tile, initializes it, and adds it to the layer div. 
+     * 
+     * Parameters:
+     * bounds - {<OpenLayers.Bounds>}
+     * position - {<OpenLayers.Pixel>}
+     * 
+     * Returns:
+     * {<OpenLayers.Tile.Image>} The added OpenLayers.Tile.Image
+     */
+    addTile:function(bounds,position) {
+        return new OpenLayers.Tile.Image(this, position, bounds, 
+                                         null, this.tileSize);
+    },
+
+    /** 
+     * APIMethod: setMap
+     * When the layer is added to a map, then we can fetch our origin 
+     *    (if we don't have one.) 
+     * 
+     * Parameters:
+     * map - {<OpenLayers.Map>}
+     */
+    setMap: function(map) {
+        OpenLayers.Layer.Grid.prototype.setMap.apply(this, arguments);
+        if (!this.tileOrigin) { 
+            this.tileOrigin = new OpenLayers.LonLat(this.map.maxExtent.left,
+                                                this.map.maxExtent.bottom);
+        }                                       
+    },
+
+    CLASS_NAME: "OpenLayers.Layer.TMS"
+});
+