function execute() {
     //
     var queryTask = new QueryTask("http://sepa-app-gis01/arcgis/rest/services/live/SEARCH/MapServer/2");
     var query = new Query();
     query.returnGeometry = true;
     query.outFields = [
       "POSTCODE"
     ];
     query.text = dom.byId("Postcode").value.toUpperCase();
     queryTask.execute(query, showResults);
 };

queryTask.execute(query, showResults, Error)