Question: I try to delete a list of rows from a table using this Native Query:

```
@NamedNativeQuery(name="WebGroup.DeleteIn",
query="DELETE FROM WebGroup WHERE
WebGroup.GROUP_ID IN (:IDsList)"

getEm().createNamedQuery("WebGroup.DeleteIn")
              .setParameter("IDsList", groupToDeleteIDs)
              .executeUpdate();

```

and this is the SQL that MySQL executes:

```
DELETE FROM WebGroup WHERE WebGroup.GROUP_ID IN (:IDsList)

```

SO, JPA doesn't replace the variable IDsList... 

Some one could help me please?

Answer: 
What if you add a `delay()` to the fadeout? For example 1-2 seconds. That way you can move your mouse away and back onto the dropdown without causing any animations.

<http://api.jquery.com/delay/>
The best way I've found to deal with such issues is to use the [HoverIntent](http://cherne.net/brian/resources/jquery.hoverIntent.html) plug-in. It was designed to prevent the flicker problems you're having.