change saleitem query and js for order reservation

app/assets/javascripts/custom.js

@@ -157,3 +157,15 @@ $(document).ready(function() {
    }
   //end Notificaiotn message
 });
+
+/* start order reservation function */
+function audioPlayBackground(shop_code,audio){
+  // console.log(shop_code);
+  //audio play
+  var audio = new Audio('/'+audio); // define your audio
+  // setTimeout(function(){
+    // audio.loop = true;
+    audio.play();
+  // },10000);
+}
+/* end order reservation function */