add 'renderer' url param.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@11780 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

examples/select-feature.html

@@ -22,7 +22,13 @@
                 {layers: 'basic'}
             ); 
 
-            var vectors = new OpenLayers.Layer.Vector("Vector Layer");
+            // allow testing of specific renderers via "?renderer=Canvas", etc
+            var renderer = OpenLayers.Util.getParameters(window.location.href).renderer;
+            renderer = (renderer) ? [renderer] : OpenLayers.Layer.Vector.prototype.renderers;
+
+            var vectors = new OpenLayers.Layer.Vector("Vector Layer", {
+                renderers: renderer
+            });
             vectors.events.on({
                 'featureselected': function(feature) {
                     $('counter').innerHTML = this.selectedFeatures.length;