diff --git a/lib/OpenLayers/Format/Filter.js b/lib/OpenLayers/Format/Filter.js
index 6dca428787..142ffb71e4 100644
--- a/lib/OpenLayers/Format/Filter.js
+++ b/lib/OpenLayers/Format/Filter.js
@@ -92,7 +92,6 @@ OpenLayers.Format.Filter = OpenLayers.Class(OpenLayers.Format.XML, {
         if(typeof data == "string") {
             data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
         }
-        var root = data.nodeType == 9 ? data.documentElement : data;
         var version = this.version;
         if(!version) {
             version = this.defaultVersion;
diff --git a/lib/OpenLayers/Format/Filter/v1.js b/lib/OpenLayers/Format/Filter/v1.js
index 7fbff41895..d4f5080f5d 100644
--- a/lib/OpenLayers/Format/Filter/v1.js
+++ b/lib/OpenLayers/Format/Filter/v1.js
@@ -61,7 +61,7 @@ OpenLayers.Format.Filter.v1 = OpenLayers.Class(OpenLayers.Format.XML, {
      */
     read: function(data) {
         var obj = {};
-        var filter = this.readers.ogc["Filter"].apply(this, [data, obj]);
+        this.readers.ogc["Filter"].apply(this, [data, obj]);
         return obj.filter;
     },
     
diff --git a/lib/OpenLayers/Format/XML.js b/lib/OpenLayers/Format/XML.js
index 02bbde1c4c..95c3633e8f 100644
--- a/lib/OpenLayers/Format/XML.js
+++ b/lib/OpenLayers/Format/XML.js
@@ -475,7 +475,6 @@ OpenLayers.Format.XML = OpenLayers.Class(OpenLayers.Format, {
      */
     createElementNSPlus: function(name, options) {
         options = options || {};
-        var loc = name.indexOf(":");
         // order of prefix preference
         // 1. in the uri option
         // 2. in the prefix option
@@ -483,7 +482,7 @@ OpenLayers.Format.XML = OpenLayers.Class(OpenLayers.Format, {
         // 4. from the defaultPrefix
         var uri = options.uri || this.namespaces[options.prefix];
         if(!uri) {
-            loc = name.indexOf(":");
+            var loc = name.indexOf(":");
             uri = this.namespaces[name.substring(0, loc)];
         }
         if(!uri) {
@@ -516,7 +515,7 @@ OpenLayers.Format.XML = OpenLayers.Class(OpenLayers.Format, {
      *     setAttributeNS will be used instead of setAttribute.
      */
     setAttributes: function(node, obj) {
-        var value, loc, alias, uri;
+        var value, uri;
         for(var name in obj) {
             if(obj[name] != null && obj[name].toString) {
                 value = obj[name].toString();