diff --git a/examples/strategy-cluster-extended.js b/examples/strategy-cluster-extended.js
index e3372bd337..163cbf47d5 100644
--- a/examples/strategy-cluster-extended.js
+++ b/examples/strategy-cluster-extended.js
@@ -73,67 +73,67 @@ var map, vectorlayer, features, stylemap, select;
 
     // The function that gets called on feature selection: shows information 
     // about the feature/cluser in a div on the page 
-	var showInformation = function(evt){
+    var showInformation = function(evt){
         var feature = evt.feature;
-		var info = 'Last hovered feature:<br>';
-		if (feature.cluster) {
-			info += '&nbsp;&nbsp;Cluster of ' + feature.attributes.count + ' features:';
-			var clazzes = {
-				'1': 0,
-				'2': 0,
-				'3': 0,
-				'4': 0
-			};
-			for (var i = 0; i < feature.attributes.count; i++) {
-				var feat = feature.cluster[i];
-				clazzes[feat.attributes.clazz]++;
-			}
-			for (var j=1; j<=4; j++) {
-				var plural_s = (clazzes[j] !== 1) ? 's' : '';
-				info += '<br>&nbsp;&nbsp;&nbsp;&nbsp;&bull;&nbsp;clazz ' + j + ': ' + clazzes[j] + ' feature' + plural_s;
-			}
-		} else {
-			info += '&nbsp;&nbsp;Single feature of clazz = ' + feature.attributes.clazz;
-		}
-		document.getElementById('info').innerHTML = info;
+        var info = 'Last hovered feature:<br>';
+        if (feature.cluster) {
+            info += '&nbsp;&nbsp;Cluster of ' + feature.attributes.count + ' features:';
+            var clazzes = {
+                '1': 0,
+                '2': 0,
+                '3': 0,
+                '4': 0
+            };
+            for (var i = 0; i < feature.attributes.count; i++) {
+                var feat = feature.cluster[i];
+                clazzes[feat.attributes.clazz]++;
+            }
+            for (var j=1; j<=4; j++) {
+                var plural_s = (clazzes[j] !== 1) ? 's' : '';
+                info += '<br>&nbsp;&nbsp;&nbsp;&nbsp;&bull;&nbsp;clazz ' + j + ': ' + clazzes[j] + ' feature' + plural_s;
+            }
+        } else {
+            info += '&nbsp;&nbsp;Single feature of clazz = ' + feature.attributes.clazz;
+        }
+        document.getElementById('info').innerHTML = info;
     };
 
-	// The function that gets called on feature selection. Shows information 
+    // The function that gets called on feature selection. Shows information 
     // about the number of "points" on the map.
-	var updateGeneralInformation = function() {
-		var info = 'Currently ' + vectorlayer.features.length + ' points are shown on the map.';
-		document.getElementById('generalinfo').innerHTML = info;
-	};
-	
-	// instanciate the map
-	map = new OpenLayers.Map("map");
+    var updateGeneralInformation = function() {
+        var info = 'Currently ' + vectorlayer.features.length + ' points are shown on the map.';
+        document.getElementById('generalinfo').innerHTML = info;
+    };
+    
+    // instanciate the map
+    map = new OpenLayers.Map("map");
     
-	// background WMS
+    // background WMS
     var ol_wms = new OpenLayers.Layer.WMS("OpenLayers WMS", "http://vmap0.tiles.osgeo.org/wms/vmap0", {
         layers: "basic"
     });
     
-	// context to style the vectorlayer
+    // context to style the vectorlayer
     var context = {
         getColor: function(feature){
             var color = '#aaaaaa';
-			if (feature.attributes.clazz && feature.attributes.clazz === 4) {
-				color = '#ee0000';
-			} else if(feature.cluster) {
-				var onlyFour = true;
-				for (var i = 0; i < feature.cluster.length; i++) {
-					if (onlyFour && feature.cluster[i].attributes.clazz !== 4) {
-						onlyFour = false;
-					}
-				}
-				if (onlyFour === true) {
-					color = '#ee0000';
-				}
-			}
-			return color;
+            if (feature.attributes.clazz && feature.attributes.clazz === 4) {
+                color = '#ee0000';
+            } else if(feature.cluster) {
+                var onlyFour = true;
+                for (var i = 0; i < feature.cluster.length; i++) {
+                    if (onlyFour && feature.cluster[i].attributes.clazz !== 4) {
+                        onlyFour = false;
+                    }
+                }
+                if (onlyFour === true) {
+                    color = '#ee0000';
+                }
+            }
+            return color;
         }
     };
-	
+    
     // style the vectorlayer
     stylemap = new OpenLayers.StyleMap({
         'default': new OpenLayers.Style({
@@ -143,32 +143,32 @@ var map, vectorlayer, features, stylemap, select;
             strokeColor: "#666666",
             strokeWidth: 1,
             strokeOpacity: 1,
-			graphicZIndex: 1
+            graphicZIndex: 1
         }, {
             context: context
         }),
-		'select' : new OpenLayers.Style({
+        'select' : new OpenLayers.Style({
             pointRadius: 5,
             fillColor: "#ffff00",
             fillOpacity: 1,
             strokeColor: "#666666",
             strokeWidth: 1,
             strokeOpacity: 1,
-			graphicZIndex: 2
+            graphicZIndex: 2
         })
     });
     
     // the vectorlayer
     vectorlayer = new OpenLayers.Layer.Vector('Vectorlayer', {styleMap: stylemap, strategies: []});
     
-	// the select control
-	select = new OpenLayers.Control.SelectFeature(
+    // the select control
+    select = new OpenLayers.Control.SelectFeature(
         vectorlayer, {hover: true}
     );
     map.addControl(select);
     select.activate();
     vectorlayer.events.on({"featureselected": showInformation});
-	
+    
     map.addLayers([ol_wms, vectorlayer]);
     map.addControl(new OpenLayers.Control.LayerSwitcher());
     map.zoomToMaxExtent();
@@ -197,18 +197,18 @@ var map, vectorlayer, features, stylemap, select;
         switch(this.value) {
             case 'cluster':
                 // standard clustering
-				strategies.push(new OpenLayers.Strategy.Cluster());
+                strategies.push(new OpenLayers.Strategy.Cluster());
                 break;
             case 'attribute-cluster':
                 // use the custom class: only cluster features of the same clazz
-				strategies.push(new OpenLayers.Strategy.AttributeCluster({
+                strategies.push(new OpenLayers.Strategy.AttributeCluster({
                     attribute:'clazz'
                 }));
                 break;
             case 'rule-cluster':
                 // use the custom class: only cluster features that have a 
-				// clazz smaller than 4
-				strategies.push(new OpenLayers.Strategy.RuleCluster({
+                // clazz smaller than 4
+                strategies.push(new OpenLayers.Strategy.RuleCluster({
                     rule: new OpenLayers.Rule({
                         filter: new OpenLayers.Filter.Comparison({
                             type: OpenLayers.Filter.Comparison.LESS_THAN,
@@ -219,24 +219,24 @@ var map, vectorlayer, features, stylemap, select;
                 }));
                 break;
         }
-		// remove layer and control
+        // remove layer and control
         map.removeLayer(vectorlayer);
-		map.removeControl(select);
-		// rebuild layer
+        map.removeControl(select);
+        // rebuild layer
         vectorlayer = new OpenLayers.Layer.Vector('Vectorlayer', {styleMap: stylemap, strategies: strategies});
         map.addLayer( vectorlayer );
         vectorlayer.addFeatures(features);
         // rebuild select control
-		select = new OpenLayers.Control.SelectFeature(
-	        vectorlayer, {hover: true}
-	    );
-	    map.addControl(select);
-	    select.activate();
-	    vectorlayer.events.on({"featureselected": showInformation});
-		// update meta information
-		updateGeneralInformation();
+        select = new OpenLayers.Control.SelectFeature(
+            vectorlayer, {hover: true}
+        );
+        map.addControl(select);
+        select.activate();
+        vectorlayer.events.on({"featureselected": showInformation});
+        // update meta information
+        updateGeneralInformation();
     };
-	// bind the behviour to the radios
+    // bind the behviour to the radios
     var inputs = document.getElementsByTagName('input');
     for( var cnt = 0; cnt < inputs.length; cnt++) {
       var input = inputs[cnt];