diff --git a/lib/OpenLayers/Layer.js b/lib/OpenLayers/Layer.js
index 6918a5e1a7..ef738d5f54 100644
--- a/lib/OpenLayers/Layer.js
+++ b/lib/OpenLayers/Layer.js
@@ -1,10 +1,11 @@
 OpenLayers.Layer = Class.create();
 
 OpenLayers.Layer.prototype = {
-    // str: name
+
+    // str
     name: null,
 
-    // DOMElement: div
+    // DOMElement
     div: null,
 
     // OpenLayers.Map
@@ -16,8 +17,8 @@ OpenLayers.Layer.prototype = {
     initialize: function(name) {
         this.name = name;
         this.div = OpenLayers.Util.createDiv();
-        this.div.style.width="100%";
-        this.div.style.height="100%";
+        this.div.style.width = "100%";
+        this.div.style.height = "100%";
     },
     
     /**
@@ -37,10 +38,16 @@ OpenLayers.Layer.prototype = {
         return;
     },
     
+    /**
+    * @return {bool}
+    */
     getVisibility: function() {
         return (this.div.style.display != "none");
     },
 
+    /** 
+    * @param {bool} visible
+    */
     setVisibility: function(visible) {
         this.div.style.display = (visible) ? "block" : "none";
     }