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: 
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.
I don't seem to be getting the flickering you mentioned, but then again - I did create the markup because yours wasn't available.

```
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script language="javascript" type="text/javascript" src="http://code.jquery.com/jquery-1.4.2.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
    $("#dropdown").hover(function() { 
        $(this).stop(true,true).fadeTo('fast',1);
        $("#options").stop(true,true).slideDown();
    }, function() { 
        $(this).stop(true,true).fadeTo('fast',0.1);
        $("#options").stop(true,true).slideUp();
    }
);
});
</script>
</head>
<body>
<div id="dropdown" style="width: 300px; height: 150px; border: 1px solid black;">DROPDOWN</div>
<div id="options" style="width: 300px; height: 150px; border: 1px solid black;">OPTIONS</div>

</body>
</html>

```