fix for #772 - remove usage of deprecated

git-svn-id: http://svn.openlayers.org/trunk/openlayers@3626 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

examples/gml-serialize.html

@@ -17,7 +17,7 @@
             feature.attributes['name'] = name;
             s = new XMLSerializer();
             var data = g.write(feature.layer.features);
-            $("gml").value = s.serializeToString(data);
+            OpenLayers.Util.getElement("gml").value = s.serializeToString(data);
         }
         function init(){
             g = new OpenLayers.Format.GML();